Electrical wiring, power switches, dangerous voltages.
T4B
16 1 1
volt and amp meters, multimeters, wattmeters, fuses, switches
T4C
11 1 1
Marker/signal generator, crystal calibrator, impedance match
T4D
11 1 1
Dummy antennas and S-meters
T5A
12 1 1
Resistance, inductance and capacitance
T5B
15 1 1
Resistance, inductance and capacitance in series and parallel
T6A
14 1 1
Resistors, variable and fixed, color code, power ratings, symbols
T6B
16 1 1
Fixed/variable inductors and capacitors, symbols, construction
T7A
20 1 1
Transmitter/receiver block diagrams. RF filters
T8A
12 1 1
Concepts and types of modulation
T8B
12 1 1
RF carrier, definition and typical bandwidths and FM deviation
T9A
12 1 1
Parasitic beam and non-directional antennas
T9B
18 1 1
Polarization, impedance matching and SWR, feed lines, baluns
T9C
11 1 1
Line losses by line type, length and frequency
T0A
11 1 1
RF safety fundamentals
T0B
12 1 1
RF safety terms and definitions
T0C
22 1 1
RF safety rules and guidelines
T0D
23 1 1
Routine station evaluation
T0E
28 1 1
Practical applications for VHF/UHF and above operations
[text]
T1A01
What is the control point of an amateur station?
The on/off switch of the transmitter
The input/output port of a packet controller
The variable frequency oscillator of a transmitter
The location at which the control operator function is performed
D
2001 0
T1A02
What is the term for the location at which the control operator function is performed?
The operating desk
The control point
The station location
The manual control location
B
2002 0
T1A03
Which of the following frequencies may a Technician Plus operator use?
7.1 - 7.2 MHz
14.1 - 14.2 MHz
21.1 - 21.2 MHz
28.1 - 29.2 MHz
C
2003 0
T1A04
Which amateur licenses authorize privileges on 52.525 MHz?
Extra and Advanced only
Extra, Advanced and General only
All classes except Novice
All classes
C
2004 0
T1A05
Which amateur licenses authorize privileges on 146.52 MHz?
All classes
All classes except Novice
Extra, Advanced and General only
Extra and Advanced only
B
2005 0
T1A06
Which amateur licenses authorize privileges on 223.50 MHz?
All classes
Extra, Advanced, General and Technician only
Extra, Advanced and General only
Extra and Advanced only
A
2006 0
T1A07
Which amateur licenses authorize privileges on 446.0 MHz?
All classes
All classes except Novice
Extra, Advanced and General only
Extra and Advanced only
B
2007 0
T1A08
In addition to passing both the Novice and Technician written examinations [Elements 2 and 3A], what else must you do before you are allowed to use the amateur bands below 30 MHz?
Pass the General class theory test
Notify the FCC that you intend to operate on the HF bands
Attend a class to learn about HF communications
Pass a Morse code test at a minimum speed of 5 WPM
D
2008 0
T1A09
If you are a Technician licensee awaiting the grant of your Technician Plus license, what must you have to prove that you are authorized to use the Novice amateur frequencies below 30 MHz?
A certificate from the FCC showing that you have notified them that you will be using the HF bands
A certificate showing that you have attended a class in HF communications
A Certificate of Successful Completion of Examination showing that you have passed a Morse code test
No special proof is required
C
2009 0
T1A10
What is the normal term for which a new amateur station license is granted?
5 years
7 years
10 years
For the lifetime of the licensee
C
2010 0
T1A11
What is the "grace period" during which the FCC will renew an expired 10-year license?
2 years
5 years
10 years
There is no grace period
A
2011 0
T1A12
What can you do to renew or change your operator/primary station license?
Properly fill out FCC Form 610 and send it to the FCC in Gettysburg, PA or a VEC who will file it electronically
Properly fill out FCC Form 610 and mail or fax it to the nearest FCC field office
Properly fill out FCC Form 610 and send it to the FCC in Washington, DC or e-mail the information to that office
Nothing; an amateur license never needs changing or renewing
A
2012 0
T1A13
Under what conditions, if any, may the FCC modify an amateur license?
None; only the US Congress has this authority
Whenever it so desires
Whenever such action will promote the public interest, convenience, and necessity
Only when a state of emergency exists
C
2013 0
T1B01
On what HF band may a Technician Plus licensee use FM phone emission?
10 meters
15 meters
75 meters
None
D
2014 0
T1B02
What additional privileges are available to a Technician who upgrades to Technician Plus?
Only CW in the 3.675 - 3.725 MHz frequency band
All privileges in the 1.8 - 2.0 MHz frequency band
All HF privileges available to Novice operators
All privileges in the 28.0 - 29.7 MHz frequency band
C
2015 0
T1B03
On what frequencies within the 6-meter band may phone emissions be transmitted?
50.0 - 54.0 MHz only
50.1 - 54.0 MHz only
51.0 - 54.0 MHz only
52.0 - 54.0 MHz only
B
2016 0
T1B04
On what frequencies within the 2-meter band may image emissions be transmitted?
144.1 - 148.0 MHz only
146.0 - 148.0 MHz only
144.0 - 148.0 MHz only
146.0 - 147.0 MHz only
A
2017 0
T1B05
What frequencies within the 2-meter band are reserved exclusively for CW operations?
146 - 147 MHz
146.0 - 146.1 MHz
145 - 148 MHz
144.0 - 144.1 MHz
D
2018 0
T1B06
If the FCC rules say that the amateur service is a secondary user of a frequency band, and another service is a primary user, what does this mean?
Nothing special; all users of a frequency band have equal rights to operate
Amateurs are only allowed to use the frequency band during emergencies
Amateurs are allowed to use the frequency band only if they do not cause harmful interference to primary users
Amateurs must increase transmitter power to overcome any interference caused by primary users
C
2019 0
T1B07
If you are using a frequency within a band assigned to the amateur service on a secondary basis, and a station assigned to the primary service on that band causes interference, what action should you take?
Notify the FCC's regional Engineer in Charge of the interference
Increase your transmitter's power to overcome the interference
Attempt to contact the station and request that it stop the interference
Change frequencies; you may be causing harmful interference to the other station, in violation of FCC rules
D
2020 0
T1B08
What rule applies if two amateur stations want to use the same frequency?
The station operator with a lesser class of license must yield the frequency to a higher-class licensee
The station operator with a lower power output must yield the frequency to the station with a higher power output
Both station operators have an equal right to operate on the frequency
Station operators in ITU Regions 1 and 3 must yield the frequency to stations in ITU Region 2
C
2021 0
T1B09
If a repeater is causing harmful interference to another repeater and a frequency coordinator has recommended the operation of one station only, who is responsible for resolving the interference?
The licensee of the unrecommended repeater
Both repeater licensees
The licensee of the recommended repeater
The frequency coordinator
A
2022 0
T1B10
If a repeater is causing harmful interference to another amateur repeater and a frequency coordinator has recommended the operation of both stations, who is responsible for resolving the interference?
The licensee of the repeater that has been recommended for the longest period of time
The licensee of the repeater that has been recommended the most recently
The frequency coordinator
Both repeater licensees
D
2023 0
T1B11
If a repeater is causing harmful interference to another repeater and a frequency coordinator has NOT recommended either station, who is primarily responsible for resolving the interference?
Both repeater licensees
The licensee of the repeater that has been in operation for the longest period of time
The licensee of the repeater that has been in operation for the shortest period of time
The frequency coordinator
A
2024 0
T1B12
What is the term for the average power supplied to an antenna transmission line during one RF cycle at the crest of the modulation envelope?
Peak transmitter power
Peak output power
Average radio-frequency power
Peak envelope power
D
2025 0
T1B13
What is the maximum transmitting power permitted an amateur station on 146.52 MHz?
200 watts PEP output
500 watts ERP
1000 watts DC input
1500 watts PEP output
D
2026 0
T1C01
What is the maximum frequency shift permitted for RTTY or data transmissions below 50 MHz?
0.1 kHz
0.5 kHz
1 kHz
5 kHz
C
2027 0
T1C02
What is the maximum frequency shift permitted for RTTY or data transmissions above 50 MHz?
0.1 kHz or the sending speed in bauds, whichever is greater
0.5 kHz or the sending speed in bauds, whichever is greater
5 kHz or the sending speed in bauds, whichever is greater
The FCC rules do not specify a maximum frequency shift above 50 MHz
D
2028 0
T1C03
What is the maximum symbol rate permitted for packet transmissions on the 10-meter band?
300 bauds
1200 bauds
19.6 kilobauds
56 kilobauds
B
2029 0
T1C04
What is the maximum symbol rate permitted for packet transmissions on the 2-meter band?
300 bauds
1200 bauds
19.6 kilobauds
56 kilobauds
C
2030 0
T1C05
What is the maximum symbol rate permitted for RTTY or data transmissions on the 10-meter band?
56 kilobauds
19.6 kilobauds
1200 bauds
300 bauds
C
2031 0
T1C06
What is the maximum symbol rate permitted for RTTY or data transmissions on the 6- and 2-meter bands?
56 kilobauds
19.6 kilobauds
1200 bauds
300 bauds
B
2032 0
T1C07
What is the maximum authorized bandwidth of RTTY, data or multiplexed emissions using an unspecified digital code on the 6- and 2-meter bands?
20 kHz
50 kHz
The total bandwidth shall not exceed that of a single-sideband phone emission
The total bandwidth shall not exceed 10 times that of a CW emission
A
2033 0
T1C08
What is the maximum symbol rate permitted for RTTY or data transmissions above 222 MHz?
300 bauds
1200 bauds
19.6 kilobauds
56 kilobauds
D
2034 0
T1C09
On what exclusive frequency band may packet network relays operate on a secondary basis (with specific permission)?
50 - 51 MHz
146 - 147 MHz
219 - 220 MHz
440 - 450 MHz
C
2035 0
T1C10
What is the maximum output power permitted for digital network relays on 219-220 MHz?
25 W PEP
50 W PEP
100 W PEP
1500 W PEP
B
2036 0
T1C11
What license class must be held by the control operator of a station communicating through an amateur satellite?
Extra or Advanced
Any class except Novice
Any class
Technician with satellite endorsement
C
2037 0
T1C12
What emission type may always be used for station identification, regardless of the transmitting frequency?
CW
RTTY
MCW
Phone
A
2038 0
T1C13
What is the fastest code speed a repeater may use for automatic identification?
13 words per minute
20 words per minute
30 words per minute
There is no limitation
B
2039 0
T1C14
How often must a Technician class operator identify his or her station when operating simplex FM phone from an automobile?
Once every 15 minutes
At least every ten minutes, and at the end of each communication
At the beginning and end of each transmission
Once every 30 minutes
B
2040 0
T1C15
If you are a Novice licensee with a Certificate of Successful Completion of Examination (CSCE) for Technician Plus privileges, how should you identify your station when transmitting on 146.34 MHz?
You must give your call sign, followed by any suitable word that denotes the slant mark and the identifier "KT"
You may not operate on 146.34 MHz until your new license arrives
No special form of identification is needed
You must give your call sign and the location of the VE examination where you obtained the CSCE
A
2041 0
T1C16
If you are a Technician licensee with a Certificate of Successful Completion of Examination (CSCE) for Technician Plus privileges, how should you identify your station when transmitting on 28.4 MHz?
You must give your call sign followed by the words "plus plus"
You must give your call sign followed by the words "temporary plus"
No special form of identification is needed
You must give your call sign and the location of the VE examination where you obtained the CSCE
C
2042 0
T1D01
If you are using a language besides English to make a contact, what language must you use when identifying your station?
The language being used for the contact
The language being used for the contact, provided the US has a third-party communications agreement with that country
English
Any language of a country that is a member of the International Telecommunication Union
C
2043 0
T1D02
Which language, besides English, may you use for amateur communications?
Any language, provided you identify your station in both English and French
Any language, provided you identify your station in English
Only German, Spanish, French or Japanese
Only languages common within your ITU region
B
2044 0
T1D03
What do the FCC Rules suggest you use as an aid for correct station identification when using phone?
A speech compressor
Q signals
A phonetic alphabet
Unique words of your choice
C
2045 0
T1D04
What is the advantage in using the International Telecommunication Union (ITU) phonetic alphabet when identifying your station?
The words are internationally recognized substitutes for letters
There is no advantage
The words have been chosen to be easily pronounced by Asian cultures
It preserves traditions begun in the early days of Amateur Radio
A
2046 0
T1D05
What is one reason to avoid using "cute" phrases or word combinations to identify your station?
They are not easily understood by non-English-speaking amateurs
They might offend English-speaking amateurs
They do not meet FCC identification requirements
They might be interpreted as codes or ciphers intended to obscure the meaning of your identification
A
2047 0
T1D06
What is an amateur station called that transmits communications for the purpose of observation of propagation and reception?
A beacon
A repeater
An auxiliary station
A radio control station
A
2048 0
T1D07
What is the maximum transmitting power permitted an amateur station in beacon operation?
10 watts PEP output
100 watts PEP output
500 watts PEP output
1500 watts PEP output
B
2049 0
T1D08
What minimum class of amateur license must you hold to operate a beacon or a repeater station?
Novice
Technician
General
Amateur Extra
B
2050 0
T1D09
What minimum information must be on a label affixed to a transmitter used for telecommand (control) of model craft?
Station call sign
Station call sign and the station licensee's name
Station call sign and the station licensee's name and address
Station call sign and the station licensee's class of license
C
2051 0
T1D10
What are the station identification requirements for an amateur transmitter used for telecommand (control) of model craft?
Once every ten minutes
Once every ten minutes, and at the beginning and end of each transmission
At the beginning and end of each transmission
Station identification is not required if the transmitter is labeled with the station licensee's name, address and call sign
D
2052 0
T1D11
What is the maximum transmitter power an amateur station is allowed when used for telecommand (control) of model craft?
One milliwatt
One watt
25 watts
100 watts
B
2053 0
T1E01
If a disaster disrupts normal communication systems in an area where the amateur service is regulated by the FCC, what kinds of transmissions may stations make?
Those that are necessary to meet essential communication needs and facilitate relief actions
Those that allow a commercial business to continue to operate in the affected area
Those for which material compensation has been paid to the amateur operator for delivery into the affected area
Those that are to be used for program production or news gathering for broadcasting purposes
A
2054 0
T1E02
What information is included in an FCC declaration of a temporary state of communication emergency?
A list of organizations authorized to use radio communications in the affected area
A list of amateur frequency bands to be used in the affected area
Any special conditions and special rules to be observed during the emergency
An operating schedule for authorized amateur emergency stations
C
2055 0
T1E03
What is meant by the term broadcasting?
Transmissions intended for reception by the general public, either direct or relayed
Retransmission by automatic means of programs or signals from non-amateur stations
One-way radio communications, regardless of purpose or content
One-way or two-way radio communications between two or more stations
A
2056 0
T1E04
Which of the following one-way communications may not be transmitted in the amateur service?
Telecommands to model craft
Broadcasts intended for the general public
Brief transmissions to make adjustments to the station
Morse code practice
B
2057 0
T1E05
Which band may NOT be used by Earth stations for satellite communications?
6 meters
2 meters
70 centimeters
23 centimeters
A
2058 0
T1E06
If you wanted to use your amateur station to retransmit communications between a space shuttle and its associated Earth stations, what agency must first give its approval?
The FCC in Washington, DC
The office of your local FCC Engineer In Charge (EIC)
The National Aeronautics and Space Administration (NASA)
The Department of Defense (DOD)
C
2059 0
T1E07
What kind of payment is allowed for third-party messages sent by an amateur station?
Any amount agreed upon in advance
Donation of repairs to amateur equipment
Donation of amateur equipment
No payment of any kind is allowed
D
2060 0
T1E08
When are third-party messages allowed to be sent to a foreign country?
When sent by agreement of both control operators
When the third party speaks to a relative
They are not allowed under any circumstances
When the US has a third-party agreement with the foreign country or the third party is qualified to be a control operator
D
2061 0
T1E09
If you let an unlicensed third party use your amateur station, what must you do at your station's control point?
You must continuously monitor and supervise the third-party's participation
You must monitor and supervise the communication only if contacts are made in countries that have no third-party communications agreement with the US
You must monitor and supervise the communication only if contacts are made on frequencies below 30 MHz
You must key the transmitter and make the station identification
A
2062 0
T1E10
When may you send obscene words from your amateur station?
Only when they do not cause interference to other communications
Never; obscene words are not allowed in amateur transmissions
Only when they are not retransmitted through a repeater
Any time, but there is an unwritten rule among amateurs that they should not be used on the air
B
2063 0
T1E11
When may you send indecent words from your amateur station?
Only when they do not cause interference to other communications
Only when they are not retransmitted through a repeater
Any time, but there is an unwritten rule among amateurs that they should not be used on the air
Never; indecent words are not allowed in amateur transmissions
D
2064 0
T2A01
What is the usual input/output frequency separation for repeaters in the 2-meter band?
600 kHz
1.0 MHz
1.6 MHz
5.0 MHz
A
2065 0
T2A02
What is the usual input/output frequency separation for repeaters in the 1.25-meter band?
600 kHz
1.0 MHz
1.6 MHz
5.0 MHz
C
2066 0
T2A03
What is the usual input/output frequency separation for repeaters in the 70-centimeter band?
600 kHz
1.0 MHz
1.6 MHz
5.0 MHz
D
2067 0
T2A04
What is an autopatch?
An automatic digital connection between a US and a foreign amateur
A digital connection used to transfer data between a hand-held radio and a computer
A device that allows radio users to access the public telephone system
A video interface allowing images to be patched into a digital data stream
C
2068 0
T2A05
What is the purpose of repeater operation?
To cut your power bill by using someone else's higher power system
To help mobile and low-power stations extend their usable range
To transmit signals for observing propagation and reception
To communicate with stations in services other than amateur
B
2069 0
T2A06
What causes a repeater to "time out"?
The repeater's battery supply runs out
Someone's transmission goes on longer than the repeater allows
The repeater gets too hot and stops transmitting until its circuitry cools off
Something is wrong with the repeater
B
2070 0
T2A07
During commuting rush hours, which type of repeater operation should be discouraged?
Mobile stations
Low-power stations
Highway traffic information nets
Third-party communications nets
D
2071 0
T2A08
What is a courtesy tone (used in repeater operations)?
A sound used to identify the repeater
A sound used to indicate when a transmission is complete
A sound used to indicate that a message is waiting for someone
A sound used to activate a receiver in case of severe weather
B
2072 0
T2A09
What is the meaning of: "Your signal is full quieting..."?
Your signal is strong enough to overcome all receiver noise
Your signal has no spurious sounds
Your signal is not strong enough to be received
Your signal is being received, but no audio is being heard
A
2073 0
T2A10
How do you call another station on a repeater if you know the station's call sign?
Say "break, break 79," then say the station's call sign
Say the station's call sign, then identify your own station
Say "CQ" three times, then say the station's call sign
Wait for the station to call "CQ," then answer it
B
2074 0
T2A11
What is a repeater called that is available for anyone to use?
An open repeater
A closed repeater
An autopatch repeater
A private repeater
A
2075 0
T2A12
Why should local amateur communications use VHF and UHF frequencies instead of HF frequencies?
To minimize interference on HF bands capable of long-distance communication
Because greater output power is permitted on VHF and UHF
Because HF transmissions are not propagated locally
Because signals are louder on VHF and UHF frequencies
A
2076 0
T2A13
How might you join a closed repeater system?
Contact the control operator and ask to join
Use the repeater until told not to
Use simplex on the repeater input until told not to
Write the FCC and report the closed condition
A
2077 0
T2A14
How can on-the-air interference be minimized during a lengthy transmitter testing or loading-up procedure?
Choose an unoccupied frequency
Use a dummy load
Use a non-resonant antenna
Use a resonant antenna that requires no loading-up procedure
B
2078 0
T2A15
What is the proper way to ask someone their location when using a repeater?
Say, "What is your QTH?"
Say, "What is your 20?"
Say, "Where are you?"
Locations are not normally told by radio
C
2079 0
T2A16
Why should you pause briefly between transmissions when using a repeater?
To check the SWR of the repeater
To reach for pencil and paper for third-party communications
To listen for anyone wanting to break in
To dial up the repeater's autopatch
C
2080 0
T2A17
Why should you keep transmissions short when using a repeater?
A long transmission may prevent someone with an emergency from using the repeater
To see if the receiving station operator is still awake
To give any listening non-hams a chance to respond
To keep long-distance charges down
A
2081 0
T2A18
What is the proper way to break into a conversation on a repeater?
Wait for the end of a transmission and start calling the desired party
Shout, "break, break!" to show that you're eager to join the conversation
Turn on an amplifier and override whoever is talking
Say your call sign during a break between transmissions
D
2082 0
T2A19
What is a repeater frequency coordinator?
Someone who organizes the assembly of a repeater station
Someone who provides advice on what kind of repeater to buy
The person whose call sign is used for a repeater's identification
A person or group that recommends frequencies for repeater operation
D
2083 0
T2A20
What is it called if the frequency coordinator recommends that you operate on a specific repeater frequency pair?
FCC type acceptance
FCC type approval
Frequency division multiplexing
Repeater frequency coordination
D
2084 0
T2B01
Why should simplex be used where possible, instead of using a repeater?
Signal range will be increased
Long distance toll charges will be avoided
The repeater will not be tied up unnecessarily
Your antenna's effectiveness will be better tested
C
2085 0
T2B02
If you are talking to a station using a repeater, how would you find out if you could communicate using simplex instead?
See if you can clearly receive the station on the repeater's input frequency
See if you can clearly receive the station on a lower frequency band
See if you can clearly receive a more distant repeater
See if a third station can clearly receive both of you
A
2086 0
T2B03
If you are operating simplex on a repeater frequency, why would it be good amateur practice to change to another frequency?
The repeater's output power may ruin your station's receiver
There are more repeater operators than simplex operators
Changing the repeater's frequency is not practical
Changing the repeater's frequency requires the authorization of the FCC
C
2087 0
T2B04
Which of the following is the best way to perform an on-the-air test of a pair of hand-held transceivers on your work bench?
Operate them through a local repeater
Operate them on an unoccupied simplex frequency
Operate them into separate inverting loads
Operate them into linear amplifiers
B
2088 0
T2B05
What is the meaning of: "Your signal report is five seven..."?
Your signal is perfectly readable and moderately strong
Your signal is perfectly readable, but weak
Your signal is readable with considerable difficulty
Your signal is perfectly readable with near pure tone
A
2089 0
T2B06
What is the meaning of: "Your signal report is three three..."?
The contact is serial number thirty-three
The station is located at latitude 33 degrees
Your signal is readable with considerable difficulty and weak in strength
Your signal is unreadable, very weak in strength
C
2090 0
T2B07
What is the meaning of: "Your signal report is five nine plus 20 dB..."?
Your signal strength has increased by a factor of 100
Repeat your transmission on a frequency 20 kHz higher
The bandwidth of your signal is 20 decibels above linearity
A relative signal-strength meter reading is 20 decibels greater than strength 9
D
2091 0
T2B08
Which of the following would be the most useful for an emergency search and rescue operation?
A high-gain antenna, such as a 6-foot dish
A hand-held VHF transceiver set up to access a local repeater
An HF multiband transceiver capable of world-wide communications
A portable 40-meter dipole that could be temporarily mounted on any available support
B
2092 0
T2B09
Which of the following modes of communication are NOT available to a Technician class operator?
CW and SSB on HF bands
Amateur television (ATV)
EME (Moon bounce)
VHF packet, CW and SSB
A
2093 0
T2B10
When should digital transmissions be used on 2-meter simplex voice frequencies?
In between voice syllables
Digital operations should be avoided on simplex voice frequencies
Only in the evening
At any time, so as to encourage the best use of the band
B
2094 0
T2B11
What operating mode should your packet TNC include if you want to participate in the amateur TCP/IP network?
KISS mode
Command mode
Monitor mode
CW interface mode
A
2095 0
T2B12
Which of the following will allow you to monitor Amateur Television (ATV) on the 70-cm band?
A portable video camera
A cable ready TV receiver
An SSTV converter
A TV flyback transformer
B
2096 0
T2B13
Which of the following would be useful to create an effective weak signal VHF Amateur Radio station?
A hand-held VHF FM transceiver
A multi-mode VHF transceiver
An omni directional antenna
A mobile VHF FM transceiver
B
2097 0
T2C01
What is the proper distress call to use when operating phone?
Say "MAYDAY" several times
Say "HELP" several times
Say "EMERGENCY" several times
Say "SOS" several times
A
2098 0
T2C02
What is the proper distress call to use when operating CW?
MAYDAY
QRRR
QRZ
SOS
D
2099 0
T2C03
What is the proper way to interrupt a repeater conversation to signal a distress call?
Say "BREAK" twice, then your call sign
Say "HELP" as many times as it takes to get someone to answer
Say "SOS," then your call sign
Say "EMERGENCY" three times
A
2100 0
T2C04
What is one reason for using tactical call signs such as "command post" or "weather center" during an emergency?
They keep the general public informed about what is going on
They are more efficient and help coordinate public-service communications
They are required by the FCC
They increase goodwill between amateurs
B
2101 0
T2C05
What type of messages concerning a person's well-being are sent into or out of a disaster area?
Routine traffic
Tactical traffic
Formal message traffic
Health and Welfare traffic
D
2102 0
T2C06
What are messages called that are sent into or out of a disaster area concerning the immediate safety of human life?
Tactical traffic
Emergency traffic
Formal message traffic
Health and Welfare traffic
B
2103 0
T2C07
Why is it a good idea to have a way to operate your amateur station without using commercial AC power lines?
So you may use your station while mobile
So you may provide communications in an emergency
So you may operate in contests where AC power is not allowed
So you will comply with the FCC rules
B
2104 0
T2C08
What is the most important accessory to have for a hand-held radio in an emergency?
An extra antenna
A portable amplifier
Several sets of charged batteries
A microphone headset for hands-free operation
C
2105 0
T2C09
Which type of antenna would be a good choice as part of a portable HF amateur station that could be set up in case of an emergency?
A three-element quad
A three-element Yagi
A dipole
A parabolic dish
C
2106 0
T2C10
With what organization must you register before you can participate in RACES drills?
A local Amateur Radio club
A local racing organization
The responsible civil defense organization
The Federal Communications Commission
C
2107 0
T2C11
What is the maximum number of hours allowed per week for RACES drills?
One
Seven, but not more than one hour per day
Eight
As many hours as you want
A
2108 0
T2C12
How must you identify messages sent during a RACES drill?
As emergency messages
As amateur traffic
As official government messages
As drill or test messages
D
2109 0
T3A01
How are VHF signals propagated within the range of the visible horizon?
By sky wave
By line of sight
By plane wave
By geometric refraction
B
2110 0
T3A02
Ducting occurs in which region of the atmosphere?
F2
Ecosphere
Troposphere
Stratosphere
C
2111 0
T3A03
What effect does tropospheric bending have on 2-meter radio waves?
It lets you contact stations farther away
It causes them to travel shorter distances
It garbles the signal
It reverses the sideband of the signal
A
2112 0
T3A04
What causes tropospheric ducting of radio waves?
A very low pressure area
An aurora to the north
Lightning between the transmitting and receiving stations
A temperature inversion
D
2113 0
T3A05
What causes VHF radio waves to be propagated several hundred miles over oceans?
A polar air mass
A widespread temperature inversion
An overcast of cirriform clouds
A high-pressure zone
B
2114 0
T3A06
In which of the following frequency ranges does tropospheric ducting most often occur?
UHF
MF
HF
VHF
A
2115 0
T3A07
In which of the following frequency ranges does sky-wave propagation least often occur?
LF
UHF
HF
VHF
B
2116 0
T3A08
What weather condition may cause tropospheric ducting?
A stable high-pressure system
An unstable low-pressure system
A series of low-pressure waves
Periods of heavy rainfall
A
2117 0
T3A09
What band conditions might indicate long-range skip on the 6-meter and 2-meter bands?
Noise on the 80-meter band
The absence of signals on the 10-meter band
Very long-range skip on the 10-meter band
Strong signals on the 10-meter band from stations about 500 - 600 miles away
D
2118 0
T3A10
Which ionospheric region most affects sky-wave propagation on the 6-meter band?
The D region
The E region
The F1 region
The F2 region
B
2119 0
T3A11
How does the signal loss for a given path through the troposphere vary with frequency?
There is no relationship
The path loss decreases as the frequency increases
The path loss increases as the frequency increases
There is no path loss at all
C
2120 0
T3A12
What type of propagation usually occurs from one hand-held VHF transceiver to another nearby?
Tunnel propagation
Sky-wave propagation
Line-of-sight propagation
Auroral propagation
C
2121 0
T3A13
Which frequency band, open to Technician class amateurs, experiences summertime sporadic E propagation?
23 centimeters
6 meters
70 centimeters
1.25 meters
B
2122 0
T3A14
Which of the following emission modes are considered to be weak- signal modes and have the greatest potential for DX contacts?
Single sideband and CW
Packet radio and RTTY
Frequency modulation
Amateur television
A
2123 0
T3A15
Which Technician frequency band could offer you the best chance of sky-wave propagation?
1.25 meters
70 centimeters
23 centimeters
6 meters
D
2124 0
T3B01
Which region of the ionosphere is mainly responsible for absorbing MF/HF radio signals during the daytime?
The F2 region
The F1 region
The E region
The D region
D
2125 0
T3B02
When does ionospheric absorption of radio signals occur?
When tropospheric ducting occurs
When long-wavelength signals enter the D region
When signals travel to the F region at night
When a temperature inversion occurs
B
2126 0
T3B03
What effect does the D region of the ionosphere have on lower- frequency HF signals in the daytime?
It absorbs the signals
It bends the radio waves out into space
It refracts the radio waves back to earth
It has little or no effect on 80-meter radio waves
A
2127 0
T3B04
What causes the ionosphere to absorb radio waves?
The weather below the ionosphere
The ionization of the D region
The presence of ionized clouds in the E region
The splitting of the F region
B
2128 0
T3B05
If you are receiving a weak and distorted signal from a distant station on a frequency close to the maximum usable frequency, what type of propagation is probably occurring?
Ducting
Line-of-sight
Scatter
Ground-wave
C
2129 0
T3B06
Which ionospheric region limits daytime radio communications on the 80-meter band to short distances?
The D region
The E region
The F1 region
The F2 region
A
2130 0
T3B07
Which region of the ionosphere is the least useful for long- distance radio-wave propagation?
The D region
The E region
The F1 region
The F2 region
A
2131 0
T3B08
What is the condition of the ionosphere above a particular area of the Earth just before local sunrise?
Atmospheric attenuation is at a maximum
The D region is above the E region
The E region is above the F region
Ionization is at a minimum
D
2132 0
T3B09
When is the ionosphere above a particular area of the Earth most ionized?
Dusk
Midnight
Midday
Dawn
C
2133 0
T3B10
When is the ionosphere above a particular area of the Earth least ionized?
Shortly before dawn
Just after noon
Just after dusk
Shortly before midnight
A
2134 0
T3B11
When is the E region above a particular area of the Earth most ionized?
Dawn
Midday
Dusk
Midnight
B
2135 0
T3B12
What happens to signals that take off vertically from the antenna and are higher in frequency than the critical frequency?
They pass through the ionosphere
They are absorbed by the ionosphere
Their frequency is changed by the ionosphere to be below the maximum usable frequency
They are reflected back to their source
A
2136 0
T3B13
What causes the maximum usable frequency to vary?
The temperature of the ionosphere
The speed of the winds in the upper atmosphere
The amount of radiation received from the sun, mainly ultraviolet
The type of weather just below the ionosphere
C
2137 0
T3B14
In relation to sky-wave propagation, what does the term "maximum usable frequency" (MUF) mean?
The highest frequency signal that will reach its intended destination
The lowest frequency signal that will reach its intended destination
The highest frequency signal that is most absorbed by the ionosphere
The lowest frequency signal that is most absorbed by the ionosphere
A
2138 0
T3C01
Why might you have to retune your receiver while listening to signals from an amateur satellite?
Because of the Doppler effect
Because of the Einstein effect
Because of the Edison effect
Because of the Faraday effect
A
2139 0
T3C02
How does the Doppler effect change an amateur satellite's signal as the satellite passes overhead?
The signal's amplitude increases or decreases
The signal's frequency increases or decreases
The signal's polarization changes from horizontal to vertical
The signal's circular polarization rotates
B
2140 0
T3C03
Why do many satellites and satellite operators use circularly polarized antennas?
To correct for Doppler shift on transmitted signals
To obtain a wider beamwidth and eliminate the need to track the satellite
To reduce the fading effects of non-spin-stabilized satellites
To reduce the effects of terrestrial interference
C
2141 0
T3C04
Why do many amateur satellites operate on the VHF/UHF bands?
To take advantage of the skip zone
Because VHF/UHF equipment costs less than HF equipment
To give Technician class operators greater access to modern communications technology
Because VHF and UHF signals easily pass through the ionosphere
D
2142 0
T3C05
Why are high-gain antennas normally used for EME (moonbounce) communications?
To reduce the scattering of the reflected signal as it returns to Earth
To overcome the extreme path losses of this mode
To reduce the effects of polarization changes in the received signal
To overcome the high levels of solar noise at the receiver
B
2143 0
T3C06
Why is the Doppler effect not important when operating EME (moonbounce)?
The Doppler effect does not occur beyond the ionosphere
EME antennas are always circularly polarized to eliminate any Doppler effect
The distance between the earth and the moon does not change rapidly enough to produce the Doppler effect
The rough surface of the moon scatters signals enough to eliminate the Doppler effect
C
2144 0
T3C07
Which of the following antenna systems would be the best choice for an EME (moonbounce) station?
A single dipole antenna
An isotropic antenna
A ground-plane antenna
A high-gain array of Yagi antennas
D
2145 0
T3C08
Which antenna system would NOT be a good choice for an EME (moonbounce) station?
A parabolic-dish antenna
A multi-element array of collinear antennas
A ground-plane antenna
A high-gain array of Yagi antennas
C
2146 0
T3C09
Why is it necessary to use high-gain antennas and high transmitter power for EME (moonbounce) operation?
To overcome path losses and poor reflectivity of the moon's surface
To overcome the effects of Faraday rotation
To reduce the effects of Doppler shift
To reduce the effects of the solar wind
A
2147 0
T3C10
When is it necessary to use a higher transmitter power level when conducting satellite communications?
When the satellite is at its perigee
When the satellite is low to the horizon
When the satellite is fully illuminated by the sun
When the satellite is near directly overhead
B
2148 0
T3C11
Which of the following conditions must be met before two stations can conduct real-time communications through a satellite?
Both stations must use circularly polarized antennas
The satellite must be illuminated by the sun during the communications
The satellite must be in view of both stations simultaneously
Both stations must use high-gain antenna systems
C
2149 0
T4A01
Where should the green wire in a three-wire AC line cord be connected in a power supply?
To the fuse
To the "hot" side of the power switch
To the chassis
To the white wire
C
2150 0
T4A02
Where should the black (or red) wire in a three-wire AC line cord be connected in a power supply?
To the white wire, which connects to the "hot" side of the power switch
To the green wire, which connects to ground
To the chassis
To the fuse, which connects to the "hot" side of the power switch
D
2151 0
T4A03
Where should the white wire in a three-wire AC line cord be connected in a power supply?
To the neutral side of the power transformer's primary winding, which has a fuse
To the neutral side of the power transformer's primary winding, which does not have a fuse
To the chassis
To the black wire
B
2152 0
T4A04
What is the correct color code for a 120 VAC three-conductor power cord?
The green wire connects to the neutral terminal, white connects to the hot terminal, and black connects to the ground terminal
The black wire connects to the neutral terminal, green connects to the hot terminal, and the white wire connects to the ground terminal
The white wire connects to the neutral terminal, black connects to the hot terminal, and green connects to the ground terminal
The red wire connects to the neutral terminal, black connects to the ground terminal, and white connects to the hot terminal.
C
2153 0
T4A05
Why is the retaining screw in one terminal of a wall outlet made of brass while the other one is silver colored?
To prevent corrosion
To indicate correct wiring polarity
To better conduct current
To reduce skin effect
B
2154 0
T4A06
What is an important safety rule concerning the main electrical box in your home?
Make sure the door cannot be opened easily
Make sure something is placed in front of the door so no one will be able to get to it easily
Make sure others in your home know where it is and how to shut off the electricity
Warn others in your home never to touch the switches, even in an emergency
C
2155 0
T4A07
Where should the main power switch for a high-voltage power supply be located?
Inside the cabinet, to kill the power if the cabinet is opened
On the back side of the cabinet, out of sight
Anywhere that can be seen and reached easily
A high-voltage power supply should not be switch-operated
C
2156 0
T4A08
What document is used by almost every US city as the basis for electrical safety requirements for power wiring and antennas?
The Code of Federal Regulations
The Proceedings of the IEEE
The ITU Radio Regulations
The National Electrical Code
D
2157 0
T4A09
What document would you use to see if you comply with standard electrical safety rules when building an amateur antenna?
The Code of Federal Regulations
The Proceedings of the IEEE
The National Electrical Code
The ITU Radio Regulations
C
2158 0
T4A10
What is the minimum voltage that is usually dangerous to humans?
30 volts
100 volts
1000 volts
2000 volts
A
2159 0
T4A11
What precaution should you take when leaning over a power amplifier?
Take your shoes off
Watch out for loose jewelry contacting high voltage
Shield your face from the heat produced by the power supply
Watch out for sharp edges that may snag your clothing
B
2160 0
T4A12
What should you do if you discover someone who is being burned by high voltage?
Run from the area so you won't be burned too
Turn off the power, call for emergency help and give CPR if needed
Immediately drag the person away from the high voltage
Wait for a few minutes to see if the person can get away from the high voltage on their own, then try to help
B
2161 0
T4A13
Where should fuses be connected on a mobile transceiver's DC power cable?
Between the red and black wires
In series with just the black wire
In series with just the red wire
In series with both the red and black wires
D
2162 0
T4A14
How much electrical current flowing through the human body will probably be fatal?
As little as 1/10 of an ampere
Approximately 10 amperes
More than 20 amperes
Current through the human body is never fatal
A
2163 0
T4A15
Which body organ can be fatally affected by a very small amount of electrical current?
The heart
The brain
The liver
The lungs
A
2164 0
T4A16
How much electrical current flowing through the human body is usually painful?
As little as 1/500 of an ampere
Approximately 10 amperes
More than 20 amperes
Current flow through the human body is never painful
A
2165 0
T4B01
How is a voltmeter usually connected to a circuit under test?
In series with the circuit
In parallel with the circuit
In quadrature with the circuit
In phase with the circuit
B
2166 0
T4B02
How is an ammeter usually connected to a circuit under test?
In series with the circuit
In parallel with the circuit
In quadrature with the circuit
In phase with the circuit
A
2167 0
T4B03
Where should an RF wattmeter be connected for the most accurate readings of transmitter output power?
At the transmitter output connector
At the antenna feed point
One-half wavelength from the transmitter output
One-half wavelength from the antenna feed point
A
2168 0
T4B04
How can the range of a voltmeter be increased?
By adding resistance in series with the circuit under test
By adding resistance in parallel with the circuit under test
By adding resistance in series with the meter, between the meter and the circuit under test
By adding resistance in parallel with the meter, between the meter and the circuit under test
C
2169 0
T4B05
What happens inside a voltmeter when you switch it from a lower to a higher voltage range?
Resistance is added in series with the meter
Resistance is added in parallel with the meter
Resistance is reduced in series with the meter
Resistance is reduced in parallel with the meter
A
2170 0
T4B06
How can the range of an ammeter be increased?
By adding resistance in series with the circuit under test
By adding resistance in parallel with the circuit under test
By adding resistance in series with the meter
By adding resistance in parallel with the meter
D
2171 0
T4B07
For which measurements would you normally use a multimeter?
SWR and power
Resistance, capacitance and inductance
Resistance and reactance
Voltage, current and resistance
D
2172 0
T4B08
What might happen if you switch a multimeter to measure resistance while you have it connected to measure voltage?
The multimeter would read half the actual voltage
It would probably destroy the meter circuitry
The multimeter would read twice the actual voltage
Nothing unusual would happen; the multimeter would measure the circuit's resistance
B
2173 0
T4B09
If you switch a multimeter to read microamps and connect it into a circuit drawing 5 amps, what might happen?
The multimeter would read half the actual current
The multimeter would read twice the actual current
It would probably destroy the meter circuitry
The multimeter would read a very small value of current
C
2174 0
T4B10
At what line impedance do most RF watt meters usually operate?
25 ohms
50 ohms
100 ohms
300 ohms
B
2175 0
T4B11
What does a directional wattmeter measure?
Forward and reflected power
The directional pattern of an antenna
The energy used by a transmitter
Thermal heating in a load resistor
A
2176 0
T4B12
If a directional RF wattmeter reads 90 watts forward power and 10 watts reflected power, what is the actual transmitter output power?
10 watts
80 watts
90 watts
100 watts
B
2177 0
T4B13
If a directional RF wattmeter reads 96 watts forward power and 4 watts reflected power, what is the actual transmitter output power?
80 watts
88 watts
92 watts
100 watts
C
2178 0
T4B14
Why might you use a peak-reading RF wattmeter at your station?
To make sure your transmitter's output power is not higher than that authorized by your license class
To make sure your transmitter is not drawing too much power from the AC line
To make sure all your transmitter's power is being radiated by your antenna
To measure transmitter input and output power at the same time
A
2179 0
T4B15
What could happen to your transceiver if you replace its blown 5 amp AC line fuse with a 30 amp fuse?
The 30-amp fuse would better protect your transceiver from using too much current
The transceiver would run cooler
The transceiver could use more current than 5 amps and a fire could occur
The transceiver would not be able to produce as much RF output
C
2180 0
T4B16
Why shouldn't you use a switch rated at 1 amp to switch power to a mobile transceiver that draws 8 amps?
This would be against FCC Rules
This would be against state motor vehicle laws
The transceiver would not be able to produce as much RF output
The switch could overheat and become a safety hazard
D
2181 0
T4C01
What is a marker generator?
A high-stability oscillator that generates reference signals at exact frequency intervals
A low-stability oscillator that "sweeps" through a range of frequencies
A low-stability oscillator used to inject a signal into a circuit under test
A high-stability oscillator that can produce a wide range of frequencies and amplitudes
A
2182 0
T4C02
What is one use for a marker generator?
To calibrate the tuning dial on a receiver
To calibrate the volume control on a receiver
To test the amplitude linearity of a transmitter
To test the frequency integration of a transmitter
A
2183 0
T4C03
What device is used to inject a frequency calibration signal into a receiver?
A calibrated voltmeter
A calibrated oscilloscope
A calibrated wavemeter
A crystal calibrator
D
2184 0
T4C04
What device produces a stable, low-level signal that can be set to a desired frequency?
What device can measure an impedance mismatch in your antenna system?
A field-strength meter
An ammeter
A wavemeter
A reflectometer
D
2187 0
T4C07
Where should a reflectometer be connected for best accuracy when reading the impedance match between an antenna and its feed line?
At the antenna feed point
At the transmitter output connector
At the midpoint of the feed line
Anywhere along the feed line
A
2188 0
T4C08
If you use an RF power meter designed to operate on 3-30 MHz for VHF measurements, how accurate will its readings be?
They are not likely to be accurate
They will be accurate enough to get by
If it properly calibrates to full scale in the set position, they may be accurate
They will be accurate providing the readings are multiplied by 4.5
A
2189 0
T4C09
If you use an SWR meter designed to operate on 3-30 MHz for VHF measurements, how accurate will its readings be?
They will not be accurate
They will be accurate enough to get by
If it properly calibrates to full scale in the set position, they may be accurate
They will be accurate providing the readings are multiplied by 4.5
C
2190 0
T4C10
What frequency standard may be used to calibrate the tuning dial of a receiver?
A calibrated voltmeter
Signals from WWV and WWVH
A deviation meter
A sweep generator
B
2191 0
T4C11
What is the most accurate way to check the calibration of your receiver's tuning dial?
Monitor the BFO frequency of a second receiver
Tune to a popular amateur net frequency
Tune to one of the frequencies of station WWV or WWVH
Tune to another amateur station and ask what frequency the operator is using
C
2192 0
T4D01
What device should be connected to a transmitter's output when you are making transmitter adjustments?
A multimeter
A reflectometer
A receiver
A dummy antenna
D
2193 0
T4D02
What is a dummy antenna?
An nondirectional transmitting antenna
A nonradiating load for a transmitter
An antenna used as a reference for gain measurements
A flexible antenna usually used on hand-held transceivers
B
2194 0
T4D03
What is the main component of a dummy antenna?
A wire-wound resistor
An iron-core coil
A noninductive resistor
An air-core coil
C
2195 0
T4D04
What device is used in place of an antenna during transmitter tests so that no signal is radiated?
An antenna matcher
A dummy antenna
A low-pass filter
A decoupling resistor
B
2196 0
T4D05
Why would you use a dummy antenna?
For off-the-air transmitter testing
To reduce output power
To give comparative signal reports
To allow antenna tuning without causing interference
A
2197 0
T4D06
What minimum rating should a dummy antenna have for use with a 100 watt single-sideband phone transmitter?
100 watts continuous
141 watts continuous
175 watts continuous
200 watts continuous
A
2198 0
T4D07
Why might a dummy antenna get warm when in use?
Because it stores electric current
Because it stores radio waves
Because it absorbs static electricity
Because it changes RF energy into heat
D
2199 0
T4D08
Would a 100 watt light bulb make a good dummy load for tuning a transceiver?
Yes; a light bulb behaves exactly like a dummy load
No; the impedance of the light bulb changes as the filament gets hot
No; the light bulb would act like an open circuit
No; the light bulb would act like a short circuit
B
2200 0
T4D09
What is used to measure relative signal strength in a receiver?
An S meter
An RST meter
A signal deviation meter
An SSB meter
A
2201 0
T4D10
Why might two radios using the same antenna and receiving the same signal show two very different S-meter readings?
S meters are always referenced to the maximum RF output available from the transceiver
S meters are always referenced to the maximum discernible signal the receiver can hear
Receiver S meters give only a relative indication of received signal strength
Some S meters are calibrated to US standards while others are calibrated to foreign standards
C
2202 0
T4D11
What does your transceiver "S meter" indicate?
The transmitted audio strength
The final RF transistor amplifier source voltage
The percentage of secondary modulation
The relative received signal strength
D
2203 0
T5A01
What does resistance do in an electric circuit?
It stores energy in a magnetic field
It stores energy in an electric field
It provides electrons by a chemical reaction
It opposes the flow of electrons
D
2204 0
T5A02
What is the definition of 1 ohm?
The reactance of a circuit in which a 1-microfarad capacitor is resonant at 1 MHz
The resistance of a circuit in which a 1-amp current flows when 1 volt is applied
The resistance of a circuit in which a 1-milliamp current flows when 1 volt is applied
The reactance of a circuit in which a 1-millihenry inductor is resonant at 1 MHz
B
2205 0
T5A03
What is the basic unit of resistance?
The farad
The watt
The ohm
The resistor
C
2206 0
T5A04
What is one reason resistors are used in electronic circuits?
To block the flow of direct current while allowing alternating current to pass
To block the flow of alternating current while allowing direct current to pass
To increase the voltage of the circuit
To control the amount of current that flows for a particular applied voltage
D
2207 0
T5A05
What is the ability to store energy in a magnetic field called?
Admittance
Capacitance
Resistance
Inductance
D
2208 0
T5A06
What is the basic unit of inductance?
The coulomb
The farad
The henry
The ohm
C
2209 0
T5A07
What is a henry?
The basic unit of admittance
The basic unit of capacitance
The basic unit of inductance
The basic unit of resistance
C
2210 0
T5A08
What is one reason inductors are used in electronic circuits?
To block the flow of direct current while allowing alternating current to pass
To reduce the flow of AC while allowing DC to pass freely
To change the time constant of the applied voltage
To change alternating current to direct current
B
2211 0
T5A09
What is the ability to store energy in an electric field called?
Inductance
Resistance
Tolerance
Capacitance
D
2212 0
T5A10
What is the basic unit of capacitance?
The farad
The ohm
The volt
The henry
A
2213 0
T5A11
What is a farad?
The basic unit of resistance
The basic unit of capacitance
The basic unit of inductance
The basic unit of admittance
B
2214 0
T5A12
What is one reason capacitors are used in electronic circuits?
To block the flow of direct current while allowing alternating current to pass
To block the flow of alternating current while allowing direct current to pass
To change the time constant of the applied voltage
To change alternating current to direct current
A
2215 0
T5B01
How is the current in a DC circuit directly calculated when the voltage and resistance are known?
I = R x E [current equals resistance multiplied by voltage]
I = R / E [current equals resistance divided by voltage]
I = E / R [current equals voltage divided by resistance]
I = E / P [current equals voltage divided by power]
C
2216 0
T5B02
How is the resistance in a DC circuit calculated when the voltage and current are known?
R = I / E [resistance equals current divided by voltage]
R = E / I [resistance equals voltage divided by current]
R = I x E [resistance equals current multiplied by voltage]
R = P / E [resistance equals power divided by voltage]
B
2217 0
T5B03
How is the voltage in a DC circuit directly calculated when the current and resistance are known?
E = I / R [voltage equals current divided by resistance]
E = R / I [voltage equals resistance divided by current]
E = I x R [voltage equals current multiplied by resistance]
E = I / P [voltage equals current divided by power]
C
2218 0
T5B04
If a 12-volt battery supplies 0.25 ampere to a circuit, what is the circuit's resistance?
0.25 ohm
3 ohms
12 ohms
48 ohms
D
2219 0
T5B05
If a 12-volt battery supplies 0.15 ampere to a circuit, what is the circuit's resistance?
0.15 ohm
1.8 ohms
12 ohms
80 ohms
D
2220 0
T5B06
If a 4800-ohm resistor is connected to 120 volts, how much current will flow through it?
4 A
25 mA
25 A
40 mA
B
2221 0
T5B07
If a 48,000-ohm resistor is connected to 120 volts, how much current will flow through it?
400 A
40 A
25 mA
2.5 mA
D
2222 0
T5B08
If a 4800-ohm resistor is connected to 12 volts, how much current will flow through it?
2.5 mA
25 mA
40 A
400 A
A
2223 0
T5B09
If a 48,000-ohm resistor is connected to 12 volts, how much current will flow through it?
250 uA
250 mA
4000 mA
4000 A
A
2224 0
T5B10
If two resistors are connected in series, what is their total resistance?
The difference between the individual resistor values
Always less than the value of either resistor
The product of the individual resistor values
The sum of the individual resistor values
D
2225 0
T5B11
If two resistors are connected in parallel, what is their total resistance?
The difference between the individual resistor values
Always less than the value of either resistor
The product of the two values
The sum of the individual resistors
B
2226 0
T5B12
If two equal-value inductors are connected in series, what is their total inductance?
Half the value of one inductor
Twice the value of one inductor
The same as the value of either inductor
The value of one inductor times the value of the other
B
2227 0
T5B13
If two equal-value inductors are connected in parallel, what is their total inductance?
Half the value of one inductor
Twice the value of one inductor
The same as the value of either inductor
The value of one inductor times the value of the other
A
2228 0
T5B14
If two equal-value capacitors are connected in series, what is their total capacitance?
Twice the value of one capacitor
The same as the value of either capacitor
Half the value of either capacitor
The value of one capacitor times the value of the other
C
2229 0
T5B15
If two equal-value capacitors are connected in parallel, what is their total capacitance?
Twice the value of one capacitor
Half the value of one capacitor
The same as the value of either capacitor
The value of one capacitor times the value of the other
A
2230 0
T6A01
Which of the following are common resistor types?
Plastic and porcelain
Film and wire-wound
Electrolytic and metal-film
Iron core and brass core
B
2231 0
T6A02
What does a variable resistor or potentiometer do?
Its resistance changes when AC is applied to it
It transforms a variable voltage into a constant voltage
Its resistance changes when its slide or contact is moved
Its resistance changes when it is heated
C
2232 0
T6A03
How do you find a resistor's value?
By using a voltmeter
By using the resistor's color code
By using Thevenin's theorem for resistors
By using the Baudot code
B
2233 0
T6A04
How do you find a resistor's tolerance rating?
By using a voltmeter
By reading the resistor's color code
By using Thevenin's theorem for resistors
By reading its Baudot code
B
2234 0
T6A05
What do the first three color bands on a resistor indicate?
The value of the resistor in ohms
The resistance tolerance in percent
The power rating in watts
The resistance material
A
2235 0
T6A06
What does the fourth color band on a resistor indicate?
The value of the resistor in ohms
The resistance tolerance in percent
The power rating in watts
The resistance material
B
2236 0
T6A07
Why do resistors sometimes get hot when in use?
Some electrical energy passing through them is lost as heat
Their reactance makes them heat up
Hotter circuit components nearby heat them up
They absorb magnetic energy, which makes them hot
A
2237 0
T6A08
Why would a large size resistor be used instead of a smaller one of the same resistance value?
For better response time
For a higher current gain
For greater power dissipation
For less impedance in the circuit
C
2238 0
T6A09
What range of resistance values are possible with a 100-ohm resistor that has a 10% tolerance?
90 to 100 ohms
10 to 100 ohms
90 to 110 ohms
80 to 120 ohms
C
2239 0
T6A10
Which tolerance rating would indicate a high-precision resistor?
0.1%
5%
10%
20%
A
2240 0
T6A11
Which tolerance rating would indicate a low-precision resistor?
0.1%
5%
10%
20%
D
2241 0
T6A12
Which symbol of Figure T6-1 represents a fixed resistor?
Symbol 2
Symbol 3
Symbol 4
Symbol 5
A
2242 0
Figure T6-1
T61.BM_
T6A13
Which symbol of Figure T6-1 represents a variable resistor?
Symbol 1
Symbol 2
Symbol 3
Symbol 6
C
2243 0
Figure T6-1
T61.BM_
T6A14
What type of resistor does symbol 2 represent in Figure T6-1?
A wire-wound resistor
A carbon-film resistor
A carbon composition resistor
Symbol 2 gives no information about the resistor's type
D
2244 0
Figure T6-1
T61.BM_
T6B01
Which symbol of Figure T6-2 represents a fixed-value capacitor?
Symbol 1
Symbol 2
Symbol 3
Symbol 4
A
2245 0
Figure T6-2
T62.BM_
T6B02
In Figure T6-2, which symbol represents an adjustable inductor?
Symbol 1
Symbol 2
Symbol 3
Symbol 4
B
2246 0
Figure T6-2
T62.BM_
T6B03
In Figure T6-2, which symbol represents a fixed-value iron-core inductor?
Symbol 1
Symbol 2
Symbol 3
Symbol 4
D
2247 0
Figure T6-2
T62.BM_
T6B04
In Figure T6-2, which symbol represents an inductor wound over a toroidal core?
Symbol 1
Symbol 2
Symbol 3
Symbol 4
D
2248 0
Figure T6-2
T62.BM_
T6B05
In Figure T6-2, which symbol represents an electrolytic capacitor?
Symbol 1
Symbol 2
Symbol 3
Symbol 4
A
2249 0
Figure T6-2
T62.BM_
T6B06
In Figure T6-2, which symbol represents a variable capacitor?
Symbol 1
Symbol 2
Symbol 3
Symbol 4
C
2250 0
Figure T6-2
T62.BM_
T6B07
What is an inductor core?
The place where a coil is tapped for resonance
A tight coil of wire used in a transformer
Insulating material placed between the wires of a transformer
The place inside an inductor where its magnetic field is concentrated
D
2251 0
T6B08
What does an inductor do?
It stores energy electrostatically and opposes a change in voltage
It stores energy electrochemically and opposes a change in current
It stores energy electromagnetically and opposes a change in current
It stores energy electromechanically and opposes a change in voltage
C
2252 0
T6B09
What determines the inductance of a coil?
The core material, the core diameter, the length of the coil and whether the coil is mounted horizontally or vertically
The core diameter, the number of turns of wire used to wind the coil and the type of metal used for the wire
The core material, the number of turns used to wind the core and the frequency of the current through the coil
The core material, the core diameter, the length of the coil and the number of turns of wire used to wind the coil
D
2253 0
T6B10
As an iron core is inserted in a coil, what happens to the coil's inductance?
It increases
It decreases
It stays the same
It disappears
A
2254 0
T6B11
What can happen if you tune a ferrite-core coil with a metal tool?
The metal tool can change the coil's inductance and cause you to tune the coil incorrectly
The metal tool can become magnetized so much that you might not be able to remove it from the coil
The metal tool can pick up enough magnetic energy to become very hot
The metal tool can pick up enough magnetic energy to become a shock hazard
A
2255 0
T6B12
What describes a capacitor?
Two or more layers of silicon material with an insulating material between them
Two or more turns of wire wound around a core material
Two or more conductive plates with an insulating material between them
Two or more insulating plates with a conductive material between them
C
2256 0
T6B13
What does a capacitor do?
It stores energy electrochemically and opposes a change in current
It stores energy electrostatically and opposes a change in voltage
It stores energy electromagnetically and opposes a change in current
It stores energy electromechanically and opposes a change in voltage
B
2257 0
T6B14
What determines the capacitance of a capacitor?
The material between the plates, the area of one side of one plate, the number of plates and the spacing between the plates
The material between the plates, the number of plates and the size of the wires connected to the plates
The number of plates, the spacing between the plates and whether the dielectric material is N type or P type
The material between the plates, the area of one plate, the number of plates and the material used for the protective coating
A
2258 0
T6B15
As the plate area of a capacitor is increased, what happens to its capacitance?
It decreases
It increases
It stays the same
It disappears
B
2259 0
T6B16
Which of the following best describes a variable capacitor?
A set of fixed capacitors whose connections can be varied
Two sets of insulating plates separated by a conductor, which can be varied in distance from each other
A set of capacitors connected in a series-parallel circuit
Two sets of rotating conducting plates separated by an insulator, which can be varied in surface area exposed to each other
D
2260 0
T7A01
What circuit has a variable-frequency oscillator connected to a driver and a power amplifier?
A packet-radio transmitter
A crystal-controlled transmitter
A single-sideband transmitter
A VFO-controlled transmitter
D
2261 0
T7A02
What circuit combines signals from an IF amplifier stage and a beat-frequency oscillator (BFO), to produce an audio signal?
An AGC circuit
A detector circuit
A power supply circuit
A VFO circuit
B
2262 0
T7A03
What circuit uses a limiter and a frequency discriminator to produce an audio signal?
A double-conversion receiver
A variable-frequency oscillator
A superheterodyne receiver
An FM receiver
D
2263 0
T7A04
What circuit is pictured in Figure T7-1 if block 1 is a variable- frequency oscillator?
A packet-radio transmitter
A crystal-controlled transmitter
A single-sideband transmitter
A VFO-controlled transmitter
D
2264 0
Figure T7-1
T71.BM_
T7A05
What circuit is pictured in Figure T7-1 if block 1 is a crystal oscillator?
A crystal-controlled transmitter
A VFO-controlled transmitter
A single-sideband transmitter
A CW transceiver
A
2265 0
Figure T7-1
T71.BM_
T7A06
What purpose does block 1 serve in the simple CW transmitter pictured in Figure T7-1?
It detects the CW signal
It controls the transmitter frequency
It controls the transmitter output power
It filters out spurious emissions from the transmitter
B
2266 0
Figure T7-1
T71.BM_
T7A07
What is block 1 in Figure T7-2?
An AGC circuit
A detector
A power supply
A VFO circuit
B
2267 0
Figure T7-2
T72.BM_
T7A08
What type of circuit does Figure T7-2 represent if block 1 is a product detector?
A simple phase modulation receiver
A simple FM receiver
A simple CW and SSB receiver
A double-conversion multiplier
C
2268 0
Figure T7-2
T72.BM_
T7A09
If Figure T7-2 is a diagram of a simple single-sideband receiver, what type of circuit should be shown in block 1?
A high pass filter
A ratio detector
A low pass filter
A product detector
D
2269 0
Figure T7-2
T72.BM_
T7A10
What circuit is pictured in Figure T7-3, if block 1 is a frequency discriminator?
A double-conversion receiver
A variable-frequency oscillator
A superheterodyne receiver
An FM receiver
D
2270 0
Figure T7-3
T73.BM_
T7A11
What is block 1 in the FM receiver shown in Figure T7-3?
A frequency discriminator
A product detector
A frequency-shift modulator
A phase inverter
A
2271 0
Figure T7-3
T73.BM_
T7A12
What would happen if block 1 failed to function in the FM receiver diagram shown in Figure T7-3?
The audio output would sound loud and distorted
There would be no audio output
There would be no effect
The receiver's power supply would be short-circuited
B
2272 0
Figure T7-3
T73.BM_
T7A13
What is block 1 in Figure T7-4?
A band-pass filter
A crystal oscillator
A reactance modulator
A rectifier modulator
C
2273 0
Figure T7-4
T74.BM_
T7A14
What circuit is shown in Figure T7-4 if block 1 is a reactance modulator?
A single-sideband transmitter
A double-sideband AM transmitter
An FM transmitter
A product transmitter
C
2274 0
Figure T7-4
T74.BM_
T7A15
How would the output of the FM transmitter shown in Figure T7-4 be affected if the audio amplifier failed to operate (assuming block 1 is a reactance modulator)?
There would be no output from the transmitter
The output would be 6-dB below the normal output power
The transmitted audio would be distorted but understandable
The output would be an unmodulated carrier
D
2275 0
Figure T7-4
T74.BM_
T7A16
Why do modern HF transmitters have a built-in low-pass filter in their RF output circuits?
To reduce RF energy below a cutoff point
To reduce low-frequency interference to other amateurs
To reduce harmonic radiation
To reduce fundamental radiation
C
2276 0
T7A17
What circuit blocks RF energy above and below certain limits?
A band-pass filter
A high-pass filter
An input filter
A low-pass filter
A
2277 0
T7A18
What type of filter is used in the IF section of receivers to block energy outside a certain frequency range?
A band-pass filter
A high-pass filter
An input filter
A low-pass filter
A
2278 0
T7A19
What circuit function is found in all types of receivers?
An audio filter
A beat-frequency oscillator
A detector
An RF amplifier
C
2279 0
T7A20
What would you use to connect a dual-band antenna to a mobile transceiver which has separate VHF and UHF outputs?
A dual-needle SWR meter
A full-duplex phone patch
Twin high-pass filters
A duplexer
D
2280 0
T8A01
What is the name for unmodulated carrier wave emissions?
Phone
Test
MCW
RTTY
B
2281 0
T8A02
What is the name for emissions produced by switching a transmitter's output on and off?
Phone
Test
CW
RTTY
C
2282 0
T8A03
What term describes the process of combining an information signal with a radio signal?
Superposition
Modulation
Demodulation
Phase-inversion
B
2283 0
T8A04
What is the name for packet-radio emissions?
CW
Data
Phone
RTTY
B
2284 0
T8A05
How is tone-modulated Morse code produced?
By feeding a microphone's audio signal into an FM transmitter
By feeding an on/off keyed audio tone into a CW transmitter
By on/off keying of a carrier
By feeding an on/off keyed audio tone into a transmitter
D
2285 0
T8A06
What is the name of the voice emission most used on VHF/UHF repeaters?
Single-sideband phone
Pulse-modulated phone
Slow-scan phone
Frequency-modulated phone
D
2286 0
T8A07
Which of the following voice emission modes begins by amplitude modulating an RF carrier?
Single-sideband phone
Pulse-modulated phone
Phase-modulated phone
Width-modulated phone
A
2287 0
T8A08
What is meant by the upper-sideband (USB)?
The part of a single-sideband signal that is above the carrier frequency
The part of a single-sideband signal that is below the carrier frequency
Any frequency above 10 MHz
The carrier frequency of a single-sideband signal
A
2288 0
T8A09
What emissions are produced by a transmitter using a reactance modulator?
CW
Test
Single-sideband, suppressed-carrier phone
Phase-modulated phone
D
2289 0
T8A10
What other emission does phase modulation most resemble?
Amplitude modulation
Pulse modulation
Frequency modulation
Single-sideband modulation
C
2290 0
T8A11
What is the name for emissions produced by an on/off keyed audio tone?
RTTY
MCW
CW
Phone
B
2291 0
T8A12
If you receive a phase-modulated voice signal and a frequency- modulated voice signal, what difference will you notice?
Phase-modulated signals cannot be detected with most amateur equipment
Phase-modulated signals do not sound as clear as frequency- modulated signals
Phase-modulated signals are more difficult to tune in than frequency-modulated signals
The signals will sound the same
D
2292 0
T8B01
What is another name for a constant-amplitude radio-frequency signal?
An RF carrier
An AF carrier
A sideband carrier
A subcarrier
A
2293 0
T8B02
What is an RF carrier?
The part of a transmitter that carries the signal to the transmitter antenna
The part of a receiver that carries the signal from the antenna to the detector
A radio frequency signal that is modulated to produce a radiotelephone signal
A modulation that changes a radio frequency signal to produce a radiotelephone signal
C
2294 0
T8B03
What kind of emission would your FM transmitter produce if its microphone failed to work?
An unmodulated carrier
A phase-modulated carrier
An amplitude-modulated carrier
A frequency-modulated carrier
A
2295 0
T8B04
How would you modulate a 2-meter FM transceiver to produce packet- radio emissions?
Connect a terminal-node controller to interrupt the transceiver's carrier wave
Connect a terminal-node controller to the transceiver's microphone input
Connect a keyboard to the transceiver's microphone input
Connect a DTMF key pad to the transceiver's microphone input
B
2296 0
T8B05
Why is FM voice best for local VHF/UHF radio communications?
The carrier is not detectable
It is more resistant to distortion caused by reflected signals
It has audio that is less affected by interference from static-type electrical noise
Its RF carrier stays on frequency better than the AM modes
C
2297 0
T8B06
Why do many radio receivers have several IF filters of different bandwidths that can be selected by the operator?
Because some frequency bands are wider than others
Because different bandwidths help increase the receiver sensitivity
Because different bandwidths improve S-meter readings
Because some emission types need a wider bandwidth than others to be received properly
D
2298 0
T8B07
Which list of emission types is in order from the narrowest bandwidth to the widest bandwidth?
RTTY, CW, SSB voice, FM voice
CW, FM voice, RTTY, SSB voice
CW, RTTY, SSB voice, FM voice
CW, SSB voice, RTTY, FM voice
C
2299 0
T8B08
What is the usual bandwidth of a single-sideband amateur signal?
1 kHz
2 kHz
Between 3 and 6 kHz
Between 2 and 3 kHz
D
2300 0
T8B09
What is the usual bandwidth of a frequency-modulated amateur signal?
Less than 5 kHz
Between 5 and 10 kHz
Between 10 and 20 kHz
Greater than 20 kHz
C
2301 0
T8B10
What is the usual bandwidth of UHF amateur fast-scan television?
More than 6 MHz
About 6 MHz
About 3 MHz
About 1 MHz
B
2302 0
T8B11
What is the result of over deviation in an FM transmitter?
Increased transmitter power
Out-of-channel emissions
Increased transmitter range
Poor carrier suppression
B
2303 0
T8B12
What causes splatter interference?
Keying a transmitter too fast
Signals from a transmitter's output circuit are being sent back to its input circuit
Overmodulation of a transmitter
The transmitting antenna is the wrong length
C
2304 0
T9A01
What is a directional antenna?
An antenna that sends and receives radio energy equally well in all directions
An antenna that cannot send and receive radio energy by skywave or skip propagation
An antenna that sends and receives radio energy mainly in one direction
An antenna that uses a directional coupler to measure power transmitted
C
2305 0
T9A02
How is a Yagi antenna constructed?
Two or more straight, parallel elements are fixed in line with each other
Two or more square or circular loops are fixed in line with each other
Two or more square or circular loops are stacked inside each other
A straight element is fixed in the center of three or more elements that angle toward the ground
A
2306 0
T9A03
What type of beam antenna uses two or more parallel straight elements arranged in line with each other?
A delta loop antenna
A quad antenna
A Yagi antenna
A Zepp antenna
C
2307 0
T9A04
How many directly driven elements do most parasitic beam antennas have?
None
One
Two
Three
B
2308 0
T9A05
What is a parasitic beam antenna?
An antenna in which some elements obtain their radio energy by induction or radiation from a driven element
An antenna in which wave traps are used to magnetically couple the elements
An antenna in which all elements are driven by direct connection to the feed line
An antenna in which the driven element obtains its radio energy by induction or radiation from director elements
A
2309 0
T9A06
What are the parasitic elements of a Yagi antenna?
The driven element and any reflectors
The director and the driven element
Only the reflectors (if any)
Any directors or any reflectors
D
2310 0
T9A07
What is a cubical quad antenna?
Four straight, parallel elements in line with each other, each approximately 1/2-electrical wavelength long
Two or more parallel four-sided wire loops, each approximately one-electrical wavelength long
A vertical conductor 1/4-electrical wavelength high, fed at the bottom
A center-fed wire 1/2-electrical wavelength long
B
2311 0
T9A08
What is a delta loop antenna?
An antenna similar to a cubical quad antenna, except with triangular elements rather than square
A large copper ring or wire loop, used in direction finding
An antenna system made of three vertical antennas, arranged in a triangular shape
An antenna made from several triangular coils of wire on an insulating form
A
2312 0
T9A09
Which of the following antennas is NOT an example of a parasitic beam?
A quad
A Yagi
A collinear array
A delta loop
C
2313 0
T9A10
What type of non-directional antenna is easy to make at home and works well outdoors?
A Yagi
A delta loop
A cubical quad
A ground plane
D
2314 0
T9A11
What type of antenna is made when a magnetic-base whip antenna is placed on the roof of a car?
A Yagi
A delta loop
A cubical quad
A ground plane
D
2315 0
T9A12
If a magnetic-base whip antenna is placed on the roof of a car, in what direction does it send out radio energy?
It goes out equally well in all horizontal directions
Most of it goes in one direction
Most of it goes equally in two opposite directions
Most of it is aimed high into the air
A
2316 0
T9B01
What does horizontal wave polarization mean?
The magnetic lines of force of a radio wave are parallel to the Earth's surface
The electric lines of force of a radio wave are parallel to the Earth's surface
The electric lines of force of a radio wave are perpendicular to the Earth's surface
The electric and magnetic lines of force of a radio wave are perpendicular to the Earth's surface
B
2317 0
T9B02
What does vertical wave polarization mean?
The electric lines of force of a radio wave are parallel to the Earth's surface
The magnetic lines of force of a radio wave are perpendicular to the Earth's surface
The electric lines of force of a radio wave are perpendicular to the Earth's surface
The electric and magnetic lines of force of a radio wave are parallel to the Earth's surface
C
2318 0
T9B03
What is one advantage of using a single element vertical antenna?
It usually has a high angle of radiation
It is always a ground-independent antenna
It usually has a low-angle radiation pattern
It usually creates a high SWR on the transmission line
C
2319 0
T9B04
What electromagnetic-wave polarization does a Yagi antenna have when its elements are parallel to the Earth's surface?
Circular
Helical
Horizontal
Vertical
C
2320 0
T9B05
What electromagnetic-wave polarization does a half-wavelength antenna have when it is perpendicular to the Earth's surface?
Circular
Horizontal
Parabolical
Vertical
D
2321 0
T9B06
What electromagnetic-wave polarization does most man-made electrical noise have in the HF and VHF spectrum?
Horizontal
Left-hand circular
Right-hand circular
Vertical
D
2322 0
T9B07
What electromagnetic-wave polarization do most repeaters have in the VHF and UHF spectrum?
Horizontal
Vertical
Right-hand circular
Left-hand circular
B
2323 0
T9B08
What electromagnetic-wave polarization is used for most satellite operation?
Only horizontal
Only vertical
Circular
No polarization
C
2324 0
T9B09
What does standing-wave ratio mean?
The ratio of maximum to minimum inductances on a feed line
The ratio of maximum to minimum capacitances on a feed line
The ratio of maximum to minimum impedances on a feed line
The ratio of maximum to minimum voltages on a feed line
D
2325 0
T9B10
Why should you try to maintain a low SWR when a VHF parasitic beam is fed with coaxial cable?
A low SWR reduces spurious emissions
A low SWR allows the transmission line to warm up in cold weather
A low SWR results in a more efficient transfer of energy from the transmission line to the antenna
A low SWR reduces front-end overload in neighboring television receivers
C
2326 0
T9B11
What does forward power mean?
The power traveling from the transmitter to the antenna
The power radiated from the top of an antenna system
The power produced during the positive half of an RF cycle
The power used to drive a linear amplifier
A
2327 0
T9B12
What does reflected power mean?
The power radiated down to the ground from an antenna
The power returned towards the source on a transmission line
The power produced during the negative half of an RF cycle
The power returned to an antenna by buildings and trees
B
2328 0
T9B13
What happens to radio energy when it is sent through a poor quality coaxial cable?
It causes spurious emissions
It is returned to the transmitter's chassis ground
It is converted to heat in the cable
It causes interference to other stations near the transmitting frequency
C
2329 0
T9B14
What is one disadvantage of using parallel-conductor open-wire transmission line?
It is more difficult to properly install
It is more expensive than coax
Its balanced characteristics cannot be matched to the 50-ohm output impedance of modern transceivers
It cannot be operated efficiently with a high SWR
A
2330 0
T9B15
What is an unbalanced line?
A feed line with neither conductor connected to ground
A feed line with both conductors connected to ground
A feed line with one conductor connected to ground
All of these answers are correct
C
2331 0
T9B16
What is a balanced line?
A feed line that has its inner conductor balanced with the outer shield
A feed line that is always operated at a low SWR to preserve its balance
A feed line with an impedance that is balanced at 450 ohms or more
A feed line made of 2 parallel conductors with a uniform space between them
D
2332 0
T9B17
What device can be installed to feed a balanced antenna with an unbalanced feed line?
A balun
A loading coil
A triaxial transformer
A wavetrap
A
2333 0
T9B18
Which of the following would you NOT use to make a balun?
A toroid
A length of transmission line
A pair of tantalum capacitors
A pair of air-wound coils
C
2334 0
T9C01
What common connector usually joins RG-213 coaxial cable to an HF transceiver?
An F-type cable connector
A PL-259 connector
A banana plug connector
A binding post connector
B
2335 0
T9C02
What common connector usually joins a hand-held transceiver to its antenna?
A BNC connector
A PL-259 connector
An F-type cable connector
A binding post connector
A
2336 0
T9C03
Which of these common connectors has the lowest loss at UHF?
An F-type cable connector
A type-N connector
A BNC connector
A PL-259 connector
B
2337 0
T9C04
If you install a 6-meter Yagi antenna on a tower 150 feet from your transmitter, which of the following feed lines is best?
RG-213
RG-58
RG-59
RG-174
A
2338 0
T9C05
If you have a transmitter and an antenna that are 50 feet apart, but are connected by 200 feet of RG-58 coaxial cable, what should you do to reduce antenna system loss?
Cut off the excess cable so the feed line is an even number of wavelengths long
Cut off the excess cable so the feed line is an odd number of wavelengths long
Cut off the excess cable
Roll the excess cable into a coil that is as small as possible
C
2339 0
T9C06
As the length of a feed line is changed, what happens to signal loss?
Signal loss is the same for any length of feed line
Signal loss increases as length increases
Signal loss decreases as length increases
Signal loss is the least when the length is the same as the signal's wavelength
B
2340 0
T9C07
As the frequency of a signal is changed, what happens to signal loss in a feed line?
Signal loss is the same for any frequency
Signal loss increases with increasing frequency
Signal loss increases with decreasing frequency
Signal loss is the least when the signal's wavelength is the same as the feed line's length
B
2341 0
T9C08
If your antenna feed line gets hot when you are transmitting, what might this mean?
You should transmit using less power
The conductors in the feed line are not insulated very well
The feed line is too long
The SWR may be too high, or the feed line loss may be high
D
2342 0
T9C09
Why should you regularly clean, tighten and re-solder all antenna connectors?
To help keep their resistance at a minimum
To keep them looking nice
To keep them from getting stuck in place
To increase their capacitance
A
2343 0
T9C10
Which of the following is a reason to use good-quality, large- diameter coax in your VHF installations?
To allow operation with a high SWR
To keep the signal confined to the center conductor
To keep losses to a minimum
To allow operation on harmonically related bands
C
2344 0
T9C11
Why is household lamp cord (zip-cord) not a good feed line to use for a 6 meter antenna installation?
The line would not warm up properly at this frequency
Line losses would be great at this frequency
Line impedance would be too great at this frequency
Line impedance would be too low at this frequency
B
2345 0
T0A01
Why is it a good idea to adhere to the FCC's Rules for using the minimum power needed when you are transmitting with your hand-held radio?
Large fines are always imposed on operators violating this rule
To reduce the level of RF radiation exposure to the operator's head
To reduce calcification of the NiCd battery pack
To eliminate self oscillation in the receiver RF amplifier
B
2346 0
T0A02
Over what frequency range are the FCC Regulations most stringent for RF radiation exposure?
Frequencies below 300 kHz
Frequencies between 300 kHz and 3 MHz
Frequencies between 3 MHz and 30 MHz
Frequencies between 30 MHz and 300 MHz
D
2347 0
Fig. NT0-1
NT01.RF
T0A03
What is one biological effect to the eye that can result from RF exposure?
The strong magnetic fields can cause blurred vision
The strong magnetic fields can cause polarization lens
It can cause heating, which can result in the formation of cataracts
It can cause heating, which can result in astigmatism
C
2348 0
T0A04
How do you calculate the boundary between the near field and the far field of a full sized dipole or Yagi antenna?
Multiply the square root of the antenna length by 2 and divide by the frequency of the signal
Multiply the square of the antenna length by 2 and divide by the wavelength of the signal
Divide the antenna length by 2 and multiply by the frequency
Divide the square of the antenna length by 2 and multiply by the wavelength
B
2349 0
T0A05
In the far field, as the distance from the source increases, how does power density vary?
The power density is proportional to the square of the distance
The power density is proportional to the square root of the distance
The power density is proportional to the inverse square of the distance
The power density is proportional to the inverse cube of the distance
C
2350 0
T0A06
In the near field, how does the field strength vary with distance from the source?
It always increases with the cube of the distance
It always decreases with the cube of the distance
It varies as a sine wave with distance
It depends on the type of antenna being used
D
2351 0
T0A07
In the far field, what is the relationship between the electric (E) field and magnetic (H) field?
In the formula 50 ohms equals E divided by H; it is a fixed relationship
In the formula 72 ohms equals H divided by E; it is a fixed relationship
In the formula 377 ohms equals E divided by H; it is a fixed relationship
In the formula 450 ohms equals H divided by E; it is a fixed relationship
C
2352 0
Fig. NT0-1
NT01.RF
T0A08
Why should you never look into the open end of a waveguide while the transmitter is operating?
You may be exposing your eyes to more than the maximum permissible exposure level of RF radiation
You may be exposing your eyes to more than the maximum permissible exposure level of infrared radiation
You may be exposing your eyes to more than the maximum permissible exposure level of ultraviolet radiation
All of these choices are correct
A
2353 0
T0A09
Why should you never look into the open end of a microwave feed horn antenna while the transmitter is operating?
You may be exposing your eyes to more than the maximum permissible exposure of RF radiation
You may be exposing your eyes to more than the maximum permissible exposure level of infrared radiation
You may be exposing your eyes to more than the maximum permissible exposure level of ultraviolet radiation
All of these choices are correct
A
2354 0
T0A10
Why are Amateur Radio operators required to meet the FCC RF radiation exposure limits?
The standards are applied equally to all radio services
To ensure that RF radiation occurs only in a desired direction
Because amateur station operations are more easily adjusted than those of commercial radio services
To ensure a safe operating environment for amateurs, their families and neighbors
D
2355 0
T0A11
Why are the maximum permissible exposure (MPE) levels not uniform throughout the radio spectrum?
The human body absorbs energy differently at various frequencies
Some frequency ranges have a cooling effect while others have a heating effect on the body
Some frequency ranges have no effect on the body
Radiation at some frequencies can have a catalytic effect on the body
A
2356 0
T0B01
What does the term "specific absorption rate" or SAR mean?
The degree of RF energy consumed by the ionosphere
The rate at which transmitter energy is lost because of a poor feed line
The rate at which RF energy is absorbed into the human body
The amount of signal weakening caused by atmospheric phenomena
C
2357 0
Fig. NT0-1
NT01.RF
T0B02
Which of the following terms best describe RF radiation?
Cohesive radiation
Ionizing radiation
Nonionizing radiation
Impulse radiation
C
2358 0
T0B03
Why is RF energy classified as nonionizing radiation?
Because the frequency is too high for there to be enough photon energy to ionize atoms
Because the frequency is too low for there to be enough photon energy to ionize atoms
Because it has no polar component
Because it has no power factor
B
2359 0
T0B04
On what value are the maximum permissible exposure (MPE) limits based?
The square of the mass of the exposed body
The square root of the mass of the exposed body
The whole-body specific gravity (WBSG)
The whole-body specific absorption rate (SAR)
D
2360 0
Fig. NT0-1
NT01.RF
T0B05
Why do exposure limits vary with frequency?
Lower-frequency RF fields have more energy than higher- frequency fields
Lower-frequency RF fields penetrate deeper into the body than higher-frequency fields
The body's ability to absorb RF energy varies with frequency
It is impossible to measure specific absorption rates at some frequencies
C
2361 0
T0B06
Why is the concept of "duty cycle" one factor used to determine safe RF radiation exposure levels?
It takes into account the amount of time the transmitter is operating at full power during a single transmission
It takes into account the transmitter power supply rating
It takes into account the antenna feed line loss
It takes into account the thermal effects of the final amplifier
A
2362 0
T0B07
Why is the concept of "time averaging" one factor used to determine safe RF radiation exposure levels?
It takes into account the operating frequency
It takes into account the transmit/receive time ratio during normal amateur communication
It takes into account the overall efficiency of the final amplifier
It takes into account the antenna feed line loss
B
2363 0
Fig. NT0-1
NT01.RF
T0B08
Why is the concept of "specific absorption rate (SAR)" one factor used to determine safe RF radiation exposure levels?
It takes into account the overall efficiency of the final amplifier
It takes into account the transmit/receive time ratio during normal amateur communication
It takes into account the rate at which the human body absorbs RF energy at a particular frequency
It takes into account the antenna feed line loss
C
2364 0
T0B09
Why must the frequency of an RF source be considered when evaluating RF radiation exposure?
Lower-frequency RF fields have more energy than higher- frequency fields
Lower-frequency RF fields penetrate deeper into the body than higher-frequency fields
Higher-frequency RF fields are transient in nature, and do not affect the human body
The human body absorbs more RF energy at some frequencies than at others
D
2365 0
T0B10
Which radio frequency emission has the shortest duty cycle?
Two-way exchanges of phase modulated signals
Two-way exchanges of FM telephony
Two-way exchanges of SSB, single-sideband signals
Two-way exchanges of CW, Morse code signals
C
2366 0
T0B11
From an RF safety standpoint, what impact does the duty cycle have on the minimum safe distance separating an antenna and the neighboring environment?
The lower the duty cycle, the shorter the compliance distance
The compliance distance is increased with an increase in the duty cycle
Lower duty cycles subject the environment to lower radio- frequency radiation cycles
All of these answers are correct
D
2367 0
T0B12
What effect does a 50% duty cycle have on the calculated "key down" RF safety distance from an amateur antenna to a neighboring residence?
The compliance distance is reduced
You must also multiply the distance by 50%
Duty cycle is not a consideration in the RF safety calculations
You divide the duty cycle into the inverse square of the distance
A
2368 0
T0C01
Referring to Figure NT0-1, what is the formula for calculating the maximum permissible exposure (MPE) limit for controlled environments on the 1.25-meter (222 MHz) band?
There is no formula, MPE is a fixed power density of 1.0 milliwatt per square centimeter averaged over any 6 minutes
There is no formula, MPE is a fixed power density of 0.2 milliwatt per square centimeter averaged over any 30 minutes
The MPE in milliwatts per square centimeter equals the frequency in megahertz divided by 300 averaged over any 6 minutes
The MPE in milliwatts per square centimeter equals the frequency in megahertz divided by 1500 averaged over any 30 minutes
A
2369 0
Fig. NT0-1
NT01.RF
T0C02
Referring to Figure NT0-1, what is the formula for calculating the maximum permissible exposure (MPE) limit for uncontrolled environments on the 2-meter (146 MHz) band?
There is no formula, MPE is a fixed power density of 1.0 milliwatt per square centimeter averaged over any 6 minutes
There is no formula, MPE is a fixed power density of 0.2 milliwatt per square centimeter averaged over any 30 minutes
The MPE in milliwatts per square centimeter equals the frequency in megahertz divided by 300 averaged over any 6 minutes
The MPE in milliwatts per square centimeter equals the frequency in megahertz divided by 1500 averaged over any 30 minutes
B
2370 0
Fig. NT0-1
NT01.RF
T0C03
Referring to Figure NT0-1, what is the formula for calculating the maximum permissible exposure (MPE) limit for controlled environments on the 70-centimeter (440 MHz) band?
There is no formula, MPE is a fixed power density of 1.0 milliwatt per square centimeter averaged over any 6 minutes
There is no formula, MPE is a fixed power density of 0.2 milliwatt per square centimeter averaged over any 30 minutes
The MPE in milliwatts per square centimeter equals the frequency in megahertz divided by 300 averaged over any 6 minutes
The MPE in milliwatts per square centimeter equals the frequency in megahertz divided by 1500 averaged over any 30 minutes
C
2371 0
Fig. NT0-1
NT01.RF
T0C04
Referring to Figure NT0-1, what is the formula for calculating the maximum permissible exposure (MPE) limit for uncontrolled environments on the 1240 to 1300-MHz band?
There is no formula, MPE is a fixed power density of 1.0 milliwatt per square centimeter averaged over any 6 minutes
There is no formula, MPE is a fixed power density of 0.2 milliwatt per square centimeter averaged over any 30 minutes
The MPE in milliwatts per square centimeter equals the frequency in megahertz divided by 300 averaged over any 6 minutes
The MPE in milliwatts per square centimeter equals the frequency in megahertz divided by 1500 averaged over any 30 minutes
D
2372 0
Fig. NT0-1
NT01.RF
T0C05
Referring to Figure NT0-1, what is the electric field strength of the maximum permissible exposure (MPE) limit for controlled environments on the 2-meter (144 MHz) band?
61.4 volts per meter
27.5 volts per meter
0.163 volts per meter
0.073 volts per meter
A
2373 0
Fig. NT0-1
NT01.RF
T0C06
Referring to Figure NT0-1, what is the electric field strength of the maximum permissible exposure (MPE) limit for uncontrolled environments on the 1.25-meter (222 MHz) band?
61.4 volts per meter
27.5 volts per meter
0.163 volts per meter
0.073 volts per meter
B
2374 0
Fig. NT0-1
NT01.RF
T0C07
On which of the following amateur bands will the maximum permissible exposure (MPE) limits be a constant value for controlled RF radiation exposure environments?
1240 to 1300 MHz
902 to 928 MHz
420 to 450 MHz
222 to 225 MHz
D
2375 0
Fig. NT0-1
NT01.RF
T0C08
On which of the following amateur bands will the maximum permissible exposure (MPE) limits be a constant value for uncontrolled RF radiation exposure environments?
1240 to 1300 MHz
902 to 928 MHz
420 to 450 MHz
144 to 148 MHz
D
2376 0
Fig. NT0-1
NT01.RF
T0C09
Where will you find the applicable FCC RF radiation maximum permissible exposure (MPE) limits defined?
FCC Part 97 Amateur Service Rules and Regulations
FCC Part 15 Radiation Exposure Rules and Regulations
FCC Part 1 and Office of Engineering and Technology (OET) Bulletin 65
Environmental Protection Agency Regulation 65
C
2377 0
T0C10
What factors must you consider if your repeater station antenna will be located at a site that is occupied by antennas for transmitters in other services?
Your radiated signal must be considered as part of the total RF radiation from the site when determining RF radiation exposure levels
Each individual transmitting station at a multiple-transmitter site must meet the RF radiation exposure levels
Each station at a multiple-transmitter site may add no more than 1% of the maximum permissible exposure (MPE) for that site
Amateur stations are categorically excluded from RF radiation exposure evaluation at multiple-transmitter sites
A
2378 0
T0C11
Which of the following categories describes most common amateur use of a hand-held transceiver?
Mobile devices
Portable devices
Fixed devices
None of these choices is correct
B
2379 0
T0C12
Why does the FCC consider a hand-held transceiver to be a portable device when evaluating for RF radiation exposure?
Because it is generally a low-power device
Because it is designed to be carried close to your body
Because it's transmitting antenna is generally within 20 centimeters of the human body
All of these choices are correct
C
2380 0
T0C13
Using Table NT0-1 what is the minimum safe distance for an uncontrolled RF radiation environment from a station using a half- wavelength dipole antenna on 3.5 MHz at 100 watts?
6 feet
3.4 feet
1.5 feet
3 feet
C
2381 0
Table NT0-1
Table.RF
T0C14
Using Table NT0-1 what is the minimum safe distance for an uncontrolled RF radiation environment from a station using a quarter-wave vertical antenna on 7 MHz at 100 watts?
4.0 feet
2.7 feet
1.2 feet
7.5 feet
B
2382 0
Table NT0-1
Table.RF
T0C15
Using Table NT0-1 what is the minimum safe distance for a controlled RF radiation environment from a station using a quarter-wave vertical on 28 MHz at 100 watts?
4.9 feet
3.5 feet
7 feet
11 feet
A
2383 0
Table NT0-1
Table.RF
T0C16
What is the minimum safe distance for a controlled RF radiation environment from a station using a half-wavelength dipole antenna on 7 MHz at 100 watts PEP, as specified in Table NT0-1?
1.4 feet
2 feet
3.1 feet
6.5 feet
A
2384 0
Table NT0-1
Table.RF
T0C17
Using Table NT0-1 what is the uncontrolled limit for a station using a 3.5 MHz half-wavelength dipole antenna at 100 watts?
1.5 feet
2 feet
3 feet
3.4 feet
A
2385 0
Table NT0-1
Table.RF
T0C18
Using Table NT0-1 what is the controlled limit for a station using a 21 MHz quarter-wave vertical at 100 watts?
3.7 feet
6 feet
8.2 feet
20 feet
A
2386 0
Table NT0-1
Table.RF
T0C19
Using Table NT0-1 what is the uncontrolled limit for a station using a 21 MHz quarter-wave vertical at 100 watts?
3.7 feet
8.2 feet
14.5 feet
26.5 feet
B
2387 0
Table NT0-1
Table.RF
T0C20
What is the minimum safe distance for a controlled RF radiation environment from a station using a half-wavelength dipole antenna on 21 MHz at 100 watts PEP, as specified in Table NT0-1?
1.5 feet
2 feet
4.1 feet
9.2 feet
C
2388 0
Table NT0-1
Table.RF
T0C21
What is the minimum safe distance for an uncontrolled RF radiation environment from a station using a half-wavelength dipole antenna on 21 MHz at 100 watts PEP, as specified in Table NT0-1?
2.5 feet
9.2 feet
8 feet
20.6 feet
B
2389 0
Table NT0-1
Table.RF
T0C22
Using Table NT0-1 what is the minimum safe distance for an uncontrolled RF radiation environment from a station using a 28 MHz half-wavelength dipole antenna at 100 watts?
12.3 feet
14.5 feet
27.5 feet
30 feet
A
2390 0
Table NT0-1
Table.RF
T0D01
If you do not have the equipment to measure the RF power densities present at your station, what might you do to ensure compliance with the FCC RF radiation exposure limits?
Use one or more of the methods included in FCC OET Bulletin 65
Call an FCC-Certified Test Technician to perform the measurements for you
Reduce power from 200 watts PEP to 100 watts PEP
Operate only low-duty-cycle modes such as FM
A
2391 0
T0D02
Which of the following factors must be taken into account when using a computer program to model RF fields at your station?
Height above sea level at your station
Ionization level in the F2 region of the ionosphere
Ground interactions
The latitude and longitude of your station location
C
2392 0
T0D03
In which of the following areas is it most difficult to accurately evaluate the effects of RF radiation exposure?
In the far field
In the cybersphere
In the near field
In the low-power field
C
2393 0
T0D04
Is it necessary for you to perform mathematical calculations of the RF radiation exposure if your station transmits with more than 50 watts peak envelope power (PEP)?
Yes, calculations are always required to ensure greatest accuracy
Calculations are required if your station is located in a densely populated neighborhood
No, calculations may not give accurate results, so measurements are always required
No, there are alternate means to determine if your station meets the RF radiation exposure limits
D
2394 0
T0D05
Which point on Figure NT0-2 represents the power density in the main beam of an antenna transmitting 1000 watts effective radiated power (ERP) at a location 10 meters from the antenna?
Point 1
Point 2
Point 3
Point 4
A
2395 0
Fig. NT0-2
NT02.RF
T0D06
Which point on Figure NT0-2 represents the power density in the main beam of an antenna transmitting 100 watts effective radiated power (ERP) at a location 5 meters from the antenna?
Point 1
Point 2
Point 3
Point 6
B
2396 0
Fig. NT0-2
NT02.RF
T0D07
Which point on Figure NT0-2 represents the power density in the main beam of an antenna transmitting 10 watts effective radiated power (ERP) at a location 2 meters from the antenna?
Point 1
Point 2
Point 3
Point 6
C
2397 0
Fig. NT0-2
NT02.RF
T0D08
Which point on Figure NT0-2 represents the power density in the main beam of an antenna transmitting 1000 watts effective radiated power (ERP) at a location 3 meters from the antenna?
Point 1
Point 3
Point 4
Point 5
C
2398 0
Fig. NT0-2
NT02.RF
T0D09
Which point on Figure NT0-2 represents a power density of 0.2 milliwatts per square centimeter in the main beam of an antenna transmitting 1000 watts effective radiated power (ERP)?
Point 5
Point 2
Point 3
Point 4
A
2399 0
Fig. NT0-2
NT02.RF
T0D10
For what purpose might you use the graph shown in Figure NT0-2?
To determine the maximum permissible radiated power for your license class
To help evaluate the worst case RF radiation exposure from your station
To help evaluate the efficiency of your antenna system
All of these choices are correct
B
2400 0
Fig. NT0-2
NT02.RF
T0D11
Which point on Figure NT0-2 represents the power density at a location 10 meters from the rear of an antenna transmitting 1000 watts effective radiated power (ERP)?
Point 2
Point 3
Point 6
None of these choices is correct
D
2401 0
Fig. NT0-2
NT02.RF
T0D12
Using Table NT0-1 what is the minimum safe distance for an controlled RF radiation environment from a station using a 146 MHz quarter-wave vertical antenna at 10 watts?
1.7 feet
2.5 feet
1.2 feet
2 feet
A
2402 0
Table NT0-1
Table.RF
T0D13
Using Table NT0-1 what is the minimum safe distance for a controlled RF radiation environment from a station using a 146 MHz quarter-wave vertical antenna at 50 watts?
3.7 feet
3 feet
4 feet
8.3 feet
A
2403 0
Table NT0-1
Table.RF
T0D14
Using Table NT0-1 what is the minimum safe distance for a controlled RF radiation environment from a station using a 146 MHz quarter-wave vertical antenna at 150 watts?
5 feet
6.4 feet
14.4 feet
9 feet
B
2404 0
Table NT0-1
Table.RF
T0D15
Using Table NT0-1 what is the minimum safe distance for an uncontrolled RF radiation environment from a station using a 146 MHz quarter-wave vertical antenna at 150 watts?
6 feet
14.4 feet
8.3 feet
10.5 feet
B
2405 0
Table NT0-1
Table.RF
T0D16
Using Table NT0-1 what is the minimum safe distance for an uncontrolled RF radiation environment from a station using a 146 MHz quarter-wave vertical antenna at 50 watts?
4 feet
3.7 feet
8.3 feet
9 feet
C
2406 0
Table NT0-1
Table.RF
T0D17
Using Table NT0-1 what is the minimum safe distance for an uncontrolled RF radiation environment from a station using a 146 MHz quarter-wave vertical antenna at 10 watts?
1.7 feet
3.7 feet
3 feet
4 feet
B
2407 0
Table NT0-1
Table.RF
T0D18
Using Table NT0-1 what is the minimum safe distance for an uncontrolled RF radiation environment from a station using a 446 MHz 5/8-wave vertical antenna at 10 watts?
1 foot
4.3 feet
9.6 feet
6 feet
B
2408 0
Table NT0-1
Table.RF
T0D19
Using Table NT0-1 what is the minimum safe distance for an uncontrolled RF radiation environment from a station using a 446 MHz 5/8-wave vertical antenna at 50 watts?
2.5 foot
4.3 feet
9.6 feet
9 feet
C
2409 0
Table NT0-1
Table.RF
T0D20
Using Table NT0-1 what is the minimum safe distance for an uncontrolled RF radiation environment from a station using a 446 MHz 5/8-wave vertical antenna at 150 watts?
16.7 feet
7.5 feet
6 feet
10.5 feet
A
2410 0
Table NT0-1
Table.RF
T0D21
Using Table NT0-1 what is the minimum safe distance for a controlled RF radiation environment from a station using a 446 MHz 5/8-wave vertical antenna at 150 watts?
16.7 feet
7.5 feet
2.5 feet
1 foot
B
2411 0
Table NT0-1
Table.RF
T0D22
Using Table NT0-1 what is the minimum safe distance for a controlled RF radiation environment from a station using a 446 MHz 5/8-wave vertical antenna at 50 watts?
1 foot
4.3 feet
1.9 feet
6 feet
B
2412 0
Table NT0-1
Table.RF
T0D23
Using Table NT0-1 what is the minimum safe distance for a controlled RF radiation environment from a station using a 446 MHz 5/8-wave vertical antenna at 10 watts?
1.9 feet
2.5 feet
4 feet
4.3 feet
A
2413 0
Table NT0-1
Table.RF
T0E01
For the lowest RF radiation exposure to passengers, where would you mount your mobile antenna?
On the trunk lid
On the roof
On a front fender opposite the broadcast radio antenna
On one side of the rear bumper
B
2414 0
T0E02
What should you do for safety before removing the shielding on a UHF power amplifier?
Make sure all RF screens are in place at the antenna feed line
Make sure the antenna feed line is properly grounded
Make sure the amplifier cannot accidentally be turned on
Make sure that RF leakage filters are connected
C
2415 0
T0E03
Why might mobile transceivers produce less RF radiation exposure than hand-held transceivers in mobile operations?
They do not produce less exposure because they usually have higher power levels.
They have a higher duty cycle
When mounted on a metal vehicle roof, mobile antennas are generally well shielded from vehicle occupants
Larger transmitters dissipate heat and energy more readily
C
2416 0
T0E04
What are some reasons you should never operate a power amplifier unless its covers are in place?
To maintain the required high operating temperatures of the equipment and reduce RF radiation exposure
To reduce the risk of shock from high voltages and reduce RF radiation exposure
To ensure that the amplifier will go into self oscillation and to minimize the effects of stray capacitance
To minimize the effects of stray inductance and to reduce the risk of shock from high voltages
B
2417 0
T0E05
Considering RF radiation exposure, which of the following conditions may be a reason to modify your station's antenna system?
An SWR of 1:1
High feed line losses
Feed line radiation
Nonresonant parasitic elements
C
2418 0
T0E06
Which of the following RF radiation exposure precautions might you use to ensure a safe operating environment at your amateur station?
Avoid conditions leading to "RF in the shack"
Use roof-mounted antennas for mobile operation whenever possible
Avoid conditions leading to feed line radiation
All of these choices are correct
D
2419 0
T0E07
Which of the following statements are true about a broadband instrument used to measure RF fields?
It is calibrated over a wide frequency range
It responds instantaneously over a wide frequency range
It requires no tuning
All of these choices are correct
D
2420 0
T0E08
Which of the following statements are true about a narrow bandwidth instrument used to measure RF fields?
It may operate over a wide frequency range
It's instantaneous bandwidth may be only a few kilohertz
It must be tuned to the frequency of interest
All of these choices are correct
D
2421 0
T0E09
Why is it dangerous to look into the open end of a microwave feed horn antenna with power applied?
Fields are concentrated at the open end of a microwave feed horn
The feed horn antenna disperses the radiated energy over a wide area, to increase radiation exposure
The feed horn antenna inverts the phase of the radiated energy, resulting in a strong cooling effect on nearby tissue
The feed horn antenna converts RF radiation into powerful audio signals
A
2422 0
T0E10
What is one way you can demonstrate compliance with the FCC RF radiation exposure limits?
Ensure a good RF ground connection for all transmitting antennas
Restrict accessibility to areas of high RF radiation levels
Use open-wire feed line for all transmitting antennas
Use only BNC and N-type connectors in your transmission lines
B
2423 0
Fig NT0-2
NT02.RF
T0E11
What is the maximum emission power density permitted from an amateur station under the FCC RF radiation exposure limits?
The FCC Rules specify a maximum emission of 1.0 milliwatt per square centimeter
The FCC Rules specify a maximum emission of 5.0 milliwatts per square centimeter
The FCC Rules specify exposure limits, not emission limits
The FCC Rules specify maximum emission limits that vary with frequency
C
2424 0
Fig NT0-1
NT01.RF
T0E12
Using Table NT0-1 what is the minimum safe distance for an uncontrolled RF radiation environment from a 3-element "triband" Yagi on 21 MHz at 100 watts?
16.4 feet
7.3 feet
4.5 feet
23 feet
A
2425 0
Table NT0-1
Table.RF
T0E13
Using Table NT0-1 what is the minimum safe distance for a controlled RF radiation environment from a station using a 3- element "triband" Yagi on 28 MHz at 100 watts?
15 feet
11 feet
22 feet
24.5 feet
B
2426 0
Table NT0-1
Table.RF
T0E14
Using Table NT0-1 what is the minimum safe distance for an uncontrolled RF radiation environment from a station using a 3- element "triband" Yagi on 28 MHz at 100 watts?
7 feet
24.5 feet
15 feet
34.7 feet
B
2427 0
Table NT0-1
Table.RF
T0E15
Using Table NT0-1 what is the minimum safe distance for an uncontrolled RF radiation environment from a station using a 17- element Yagi on a five-wavelength boom on 144 MHz at 10 watts?
32.4 feet
22.9 feet
2.5 feet
20 feet
B
2428 0
Table NT0-1
Table.RF
T0E16
Using Table NT0-1 what is the minimum safe distance for an uncontrolled RF radiation environment from a station using a 17- element Yagi on a five-wavelength boom on 144 MHz at 100 watts?
14.5 feet
20 feet
72.4 feet
32.4 feet
C
2429 0
Table NT0-1
Table.RF
T0E17
Using Table NT0-1 what is the minimum safe distance for an uncontrolled RF radiation environment from a station using a 17- element Yagi on a five-wavelength boom on 144 MHz at 500 watts?
20 feet
72.4 feet
162 feet
175.5 feet
C
2430 0
Table NT0-1
Table.RF
T0E18
Using Table NT0-1 what is the minimum safe distance for an uncontrolled RF radiation environment from a station using a 17- element Yagi on a five-wavelength boom on 144 MHz at 1500 watts?
45.5 feet
78.5 feet
125.5 feet
280.6 feet
D
2431 0
Table NT0-1
Table.RF
T0E19
Using Table NT0-1 what is the minimum safe distance for a controlled RF radiation environment from a station using a 17- element Yagi on a five-wavelength boom on 144 MHz at 1500 watts?
45.5 feet
125.5 feet
162 feet
175.5 feet
B
2432 0
Table NT0-1
Table.RF
T0E20
Using Table NT0-1 what is the minimum safe distance for a controlled RF radiation environment from a station using a 17- element Yagi on a five-wavelength boom on 144 MHz at 500 watts?
72.4 feet
78.5 feet
101 feet
125.5 feet
A
2433 0
Table NT0-1
Table.RF
T0E21
Using Table NT0-1 what is the minimum safe distance for a controlled RF radiation environment from a station using a 17- element Yagi on a five-wavelength boom on 144 MHz at 100 watts?
45.5 feet
78.5 feet
10.2 feet
32.4 feet
D
2434 0
Table NT0-1
Table.RF
T0E22
Using Table NT0-1 what is the minimum safe distance for a controlled RF radiation environment from a station using a 17- element Yagi on a five-wavelength boom on 144 MHz at 10 watts?
32.4 feet
78.5 feet
10.2 feet
20 feet
C
2435 0
Table NT0-1
Table.RF
T0E23
Using Table NT0-1 what is the minimum safe distance for a controlled RF radiation environment from a station using eight 17- element Yagis on five-wavelength booms for moonbounce (EME) on 144 MHz at 150 watts?
90.9 feet
57 feet
78.5 feet
181.8 feet
A
2436 0
Table NT0-1
Table.RF
T0E24
Using Table NT0-1 what is the minimum safe distance for a controlled RF radiation environment from a station using eight 17- element Yagis on five-wavelength booms for moonbounce (EME) on 144 MHz at 500 watts?
90.9 feet
175.5 feet
127 feet
166 feet
D
2437 0
Table NT0-1
Table.RF
T0E25
Using Table NT0-1 what is the minimum safe distance for a controlled RF radiation environment from a station using eight 17- element Yagis on five-wavelength booms for moonbounce (EME) on 144 MHz at 1500 watts
287.4 feet
166 feet
127 feet
232 feet
A
2438 0
Table NT0-1
Table.RF
T0E26
Using Table NT0-1 what is the uncontrolled limit for an RF radiation environment from a station using eight 17-element Yagis on five-wavelength booms for moonbounce (EME) on 144 MHz at 1500 watts?
371.1 feet
175.5 feet
642.7 feet
232 feet
C
2439 0
Table NT0-1
Table.RF
T0E27
Using Table NT0-1 what is the uncontrolled limit for an RF radiation environment from a station using eight 17-element Yagis on five-wavelength booms for moonbounce (EME) on 144 MHz at 500 watts?
203.3 feet
127 feet
401.5 feet
371.1 feet
D
2440 0
Table NT0-1
Table.RF
T0E28
Using Table NT0-1 what is the uncontrolled limit for an RF radiation environment from a station using eight 17-element Yagis on five-wavelength booms for moonbounce (EME) on 144 MHz at 150 watts?
