T1A01999NWhat 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 DT1A02999NWhat 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 BT1A03999NWhich 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 CT1A04999NWhich amateur licenses authorize privileges on 52.525 MHz? Extra and Advanced only Extra, Advanced and General only All classes except Novice All classes CT1A05999NWhich amateur licenses authorize privileges on 146.52 MHz? All classes All classes except Novice Extra, Advanced and General only Extra and Advanced only BT1A06999NWhich 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 AT1A07999NWhich amateur licenses authorize privileges on 446.0 MHz? All classes All classes except Novice Extra, Advanced and General only Extra and Advanced only BT1A08999NIn 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 DT1A09999NIf 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 CT1A10999NWhat 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 CT1A11999NWhat 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 AT1A12999NWhat 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 AT1A13999NUnder 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 CT1B01999NOn what HF band may a Technician Plus licensee use FM phone emission? 10 meters 15 meters 75 meters None DT1B02999NWhat 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 CT1B03999NOn 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 BT1B04999NOn 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 AT1B05999NWhat 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 DT1B06999NIf 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 CT1B07999NIf 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 DT1B08999NWhat 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 CT1B09999NIf 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 AT1B10999NIf 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 DT1B11999NIf 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 theshortest period of time The frequency coordinator AT1B12999NWhat 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 DT1B13999NWhat 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 DT1C01999NWhat is the maximum frequency shift permitted for RTTY or data transmissions below 50 MHz? 0.1 kHz 0.5 kHz 1 kHz 5 kHz CT1C02999NWhat 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 DT1C03999NWhat is the maximum symbol rate permitted for packet transmissions on the 10-meter band? 300 bauds 1200 bauds 19.6 kilobauds 56 kilobauds BT1C04999NWhat is the maximum symbol rate permitted for packet transmissions on the 2-meter band? 300 bauds 1200 bauds 19.6 kilobauds 56 kilobauds CT1C05999NWhat 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 CT1C06999NWhat 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 BT1C07999NWhat 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 AT1C08999NWhat is the maximum symbol rate permitted for RTTY or data transmissions above 222 MHz? 300 bauds 1200 bauds 19.6 kilobauds 56 kilobauds DT1C09999NOn 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 CT1C10999NWhat 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 BT1C11999NWhat 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 CT1C12999NWhat emission type may always be used for station identification, regardless of the transmitting frequency? CW RTTY MCW Phone AT1C13999NWhat 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 BT1C14999NHow 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 BT1C15999NIf 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 AT1C16999NIf 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 CT1D01999NIf 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 CT1D02999NWhich 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 BT1D03999NWhat 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 CT1D04999NWhat 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 AT1D05999NWhat 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 AT1D06999NWhat 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 AT1D07999NWhat 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 BT1D08999NWhat minimum class of amateur license must you hold to operate a beacon or a repeater station? Novice Technician General Amateur Extra BT1D09999NWhat 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 CT1D10999NWhat 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 DT1D11999NWhat 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 BT1E01999NIf 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 AT1E02999NWhat 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 CT1E03999NWhat 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 AT1E04999NWhich 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 BT1E05999NWhich band may NOT be used by Earth stations for satellite communications? 6 meters 2 meters 70 centimeters 23 centimeters AT1E06999NIf 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) CT1E07999NWhat 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 DT1E08999NWhen 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 DT1E09999NIf 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 USYou 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 AT1E10999NWhen 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 BT1E11999NWhen 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 DT2A01999NWhat 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 AT2A02999NWhat 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 CT2A03999NWhat 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 DT2A04999NWhat 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 CT2A05999NWhat 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 BT2A06999NWhat 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 BT2A07999NDuring commuting rush hours, which type of repeater operation should be discouraged? Mobile stations Low-power stations Highway traffic information nets Third-party communications nets DT2A08999NWhat 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 BT2A09999NWhat 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 AT2A10999NHow 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 BT2A11999NWhat is a repeater called that is available for anyone to use? An open repeater A closed repeater An autopatch repeater A private repeater AT2A12999NWhy 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 AT2A13999NHow 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 AT2A14999NHow 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 BT2A15999NWhat 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 CT2A16999NWhy 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 CT2A17999NWhy 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 AT2A18999NWhat 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 DT2A19999NWhat 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 DT2A20999NWhat 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 DT2B01999NWhy 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 CT2B02999NIf 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 AT2B03999NIf 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 CT2B04999NWhich 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 BT2B05999NWhat 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 AT2B06999NWhat 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 CT2B07999NWhat 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 DT2B08999NWhich 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 BT2B09999NWhich 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 AT2B10999NWhen 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 BT2B11999NWhat 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 AT2B12999NWhich 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 BT2B13999NWhich 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 BT2C01999NWhat 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 AT2C02999NWhat is the proper distress call to use when operating CW? MAYDAY QRRR QRZ SOS DT2C03999NWhat 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 AT2C04999NWhat 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 BT2C05999NWhat 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 DT2C06999NWhat 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 BT2C07999NWhy 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 BT2C08999NWhat 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 CT2C09999NWhich 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 CT2C10999NWith 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 CT2C11999NWhat 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 AT2C12999NHow must you identify messages sent during a RACES drill? As emergency messages As amateur traffic As official government messages As drill or test messages DT3A01999NHow are VHF signals propagated within the range of the visible horizon? By sky wave By line of sight By plane wave By geometric refraction BT3A02999NDucting occurs in which region of the atmosphere? F2 Ecosphere Troposphere Stratosphere CT3A03999NWhat 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 AT3A04999NWhat 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 DT3A05999NWhat 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 BT3A06999NIn which of the following frequency ranges does tropospheric ducting most often occur? UHF MF HF VHF AT3A07999NIn which of the following frequency ranges does sky-wave propagation least often occur? LF UHF HF VHF BT3A08999NWhat 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 AT3A09999NWhat 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 DT3A10999NWhich ionospheric region most affects sky-wave propagation on the 6-meter band? The D region The E region The F1 region The F2 region BT3A11999NHow 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 CT3A12999NWhat 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 CT3A13999NWhich frequency band, open to Technician class amateurs, experiences summertime sporadic E propagation? 23 centimeters 6 meters 70 centimeters 1.25 meters BT3A14999NWhich 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 AT3A15999NWhich Technician frequency band could offer you the best chance of sky-wave propagation? 1.25 meters 70 centimeters 23 centimeters 6 meters DT3B01999NWhich 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 DT3B02999NWhen 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 BT3B03999NWhat 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 AT3B04999NWhat 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 BT3B05999NIf 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 CT3B06999NWhich 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 AT3B07999NWhich 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 AT3B08999NWhat 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 DT3B09999NWhen is the ionosphere above a particular area of the Earth most ionized? Dusk Midnight Midday Dawn CT3B10999NWhen is the ionosphere above a particular area of the Earth least ionized? Shortly before dawn Just after noon Just after dusk Shortly before midnight AT3B11999NWhen is the E region above a particular area of the Earth most ionized? Dawn Midday Dusk Midnight BT3B12999NWhat 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 AT3B13999NWhat 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 CT3B14999NIn 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 AT3C01999NWhy 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 AT3C02999NHow 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 BT3C03999NWhy 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 CT3C04999NWhy 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 DT3C05999NWhy 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 BT3C06999NWhy 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 CT3C07999NWhich 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 DT3C08999NWhich 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 CT3C09999NWhy 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 AT3C10999NWhen 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 BT3C11999NWhich 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 CT4A01999NWhere 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 CT4A02999NWhere 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 DT4A03999NWhere 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 BT4A04999NWhat 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 terminalThe red wire connects to the neutral terminal, black connects to the ground terminal, and white connects to the hot terminal.CT4A05999NWhy 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 BT4A06999NWhat 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 CT4A07999NWhere 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 CT4A08999NWhat 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 DT4A09999NWhat 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 CT4A10999NWhat is the minimum voltage that is usually dangerous to humans? 30 volts 100 volts 1000 volts 2000 volts AT4A11999NWhat 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 BT4A12999NWhat 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 BT4A13999NWhere 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 DT4A14999NHow 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 AT4A15999NWhich body organ can be fatally affected by a very small amount of electrical current? The heart The brain The liver The lungs AT4A16999NHow 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 AT4B01999NHow 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 BT4B02999NHow 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 AT4B03999NWhere 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 AT4B04999NHow 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 CT4B05999NWhat 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 AT4B06999NHow 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 DT4B07999NFor which measurements would you normally use a multimeter? SWR and power Resistance, capacitance and inductance Resistance and reactance Voltage, current and resistance DT4B08999NWhat 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 BT4B09999NIf 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 CT4B10999NAt what line impedance do most RF watt meters usually operate? 25 ohms 50 ohms 100 ohms 300 ohms BT4B11999NWhat 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 AT4B12999NIf 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 BT4B13999NIf 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 CT4B14999NWhy 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 AT4B15999NWhat 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 CT4B16999NWhy 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 DT4C01999NWhat 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 AT4C02999NWhat 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 AT4C03999NWhat device is used to inject a frequency calibration signal into a receiver? A calibrated voltmeter A calibrated oscilloscope A calibrated wavemeter A crystal calibrator DT4C04999NWhat device produces a stable, low-level signal that can be set to a desired frequency? A wavemeter A reflectometer A signal generator An oscilloscope CT4C05999NWhat is one use for an RF signal generator? Measuring AF signal amplitudes Aligning tuned circuits Adjusting transmitter impedance-neutralizing networks Measuring transmission-line impedances BT4C06999NWhat device can measure an impedance mismatch in your antenna system? A field-strength meter An ammeter A wavemeter A reflectometer DT4C07999NWhere 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 AT4C08999NIf 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 AT4C09999NIf 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 CT4C10999NWhat 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 BT4C11999NWhat 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 CT4D01999NWhat device should be connected to a transmitter's output when you are making transmitter adjustments? A multimeter A reflectometer A receiver A dummy antenna DT4D02999NWhat 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 BT4D03999NWhat is the main component of a dummy antenna? A wire-wound resistor An iron-core coil A noninductive resistor An air-core coil CT4D04999NWhat 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 BT4D05999NWhy 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 AT4D06999NWhat 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 AT4D07999NWhy 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 DT4D08999NWould 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 BT4D09999NWhat is used to measure relative signal strength in a receiver? An S meter An RST meter A signal deviation meter An SSB meter AT4D10999NWhy 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 CT4D11999NWhat 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 DT5A01999NWhat 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 DT5A02999NWhat 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 BT5A03999NWhat is the basic unit of resistance? The farad The watt The ohm The resistor CT5A04999NWhat 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 DT5A05999NWhat is the ability to store energy in a magnetic field called? Admittance Capacitance Resistance Inductance DT5A06999NWhat is the basic unit of inductance? The coulomb The farad The henry The ohm CT5A07999NWhat is a henry? The basic unit of admittance The basic unit of capacitance The basic unit of inductance The basic unit of resistance CT5A08999NWhat 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 BT5A09999NWhat is the ability to store energy in an electric field called? Inductance Resistance Tolerance Capacitance DT5A10999NWhat is the basic unit of capacitance? The farad The ohm The volt The henry AT5A11999NWhat is a farad? The basic unit of resistance The basic unit of capacitance The basic unit of inductance The basic unit of admittance BT5A12999NWhat 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 AT5B01999NHow 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] CT5B02999NHow 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] BT5B03999NHow 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] CT5B04999NIf 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 DT5B05999NIf 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 DT5B06999NIf a 4800-ohm resistor is connected to 120 volts, how much current will flow through it? 4 A 25 mA 25 A 40 mA BT5B07999NIf 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 DT5B08999NIf 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 AT5B09999NIf 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 AT5B10999NIf 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 DT5B11999NIf 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 BT5B12999NIf 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 BT5B13999NIf 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 AT5B14999NIf 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 CT5B15999NIf 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 AT6A01999NWhich of the following are common resistor types? Plastic and porcelain Film and wire-wound Electrolytic and metal-film Iron core and brass core BT6A02999NWhat 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 CT6A03999NHow 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 BT6A04999NHow 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 BT6A05999NWhat 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 AT6A06999NWhat 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 BT6A07999NWhy 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 AT6A08999NWhy 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 CT6A09999NWhat 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 CT6A10999NWhich tolerance rating would indicate a high-precision resistor? 0.1% 5% 10% 20% AT6A11999NWhich tolerance rating would indicate a low-precision resistor? 0.1% 5% 10% 20% DT6A12999YWhich symbol of Figure T6-1 represents a fixed resistor? Symbol 2 Symbol 3 Symbol 4 Symbol 5 AT6A13999YWhich symbol of Figure T6-1 represents a variable resistor? Symbol 1 Symbol 2 Symbol 3 Symbol 6 CT6A14999YWhat 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 DT6B01999YWhich symbol of Figure T6-2 represents a fixed-value capacitor? Symbol 1 Symbol 2 Symbol 3 Symbol 4 AT6B02999YIn Figure T6-2, which symbol represents an adjustable inductor? Symbol 1 Symbol 2 Symbol 3 Symbol 4 BT6B03999YIn Figure T6-2, which symbol represents a fixed-value iron-core inductor? Symbol 1 Symbol 2 Symbol 3 Symbol 4 DT6B04999YIn Figure T6-2, which symbol represents an inductor wound over a toroidal core? Symbol 1 Symbol 2 Symbol 3 Symbol 4 DT6B05999YIn Figure T6-2, which symbol represents an electrolytic capacitor? Symbol 1 Symbol 2 Symbol 3 Symbol 4 AT6B06999YIn Figure T6-2, which symbol represents a variable capacitor? Symbol 1 Symbol 2 Symbol 3 Symbol 4 CT6B07999NWhat 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 DT6B08999NWhat 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 CT6B09999NWhat 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 DT6B10999NAs 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 AT6B11999NWhat 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 AT6B12999NWhat 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 CT6B13999NWhat 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 BT6B14999NWhat 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 coatingAT6B15999NAs the plate area of a capacitor is increased, what happens to its capacitance? It decreases It increases It stays the same It disappears BT6B16999NWhich 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 DT7A01999NWhat 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 DT7A02999NWhat 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 BT7A03999NWhat 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 DT7A04999YWhat 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 DT7A05999YWhat 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 AT7A06999YWhat 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 BT7A07999YWhat is block 1 in Figure T7-2? An AGC circuit A detector A power supply A VFO circuit BT7A08999YWhat 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 CT7A09999YIf 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 DT7A10999YWhat 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 DT7A11999YWhat 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 AT7A12999YWhat 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 BT7A13999YWhat is block 1 in Figure T7-4? A band-pass filter A crystal oscillator A reactance modulator A rectifier modulator CT7A14999YWhat 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 CT7A15999YHow 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 DT7A16999NWhy 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 CT7A17999NWhat circuit blocks RF energy above and below certain limits? A band-pass filter A high-pass filter An input filter A low-pass filter AT7A18999NWhat 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 AT7A19999NWhat circuit function is found in all types of receivers? An audio filter A beat-frequency oscillator A detector An RF amplifier CT7A20999NWhat 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 DT8A01999NWhat is the name for unmodulated carrier wave emissions? Phone Test MCW RTTY BT8A02999NWhat is the name for emissions produced by switching a transmitter's output on and off? Phone Test CW RTTY CT8A03999NWhat term describes the process of combining an information signal with a radio signal? Superposition Modulation Demodulation Phase-inversion BT8A04999NWhat is the name for packet-radio emissions? CW Data Phone RTTY BT8A05999NHow 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 DT8A06999NWhat 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 DT8A07999NWhich 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 AT8A08999NWhat 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 AT8A09999NWhat emissions are produced by a transmitter using a reactance modulator? CW Test Single-sideband, suppressed-carrier phone Phase-modulated phone DT8A10999NWhat other emission does phase modulation most resemble? Amplitude modulation Pulse modulation Frequency modulation Single-sideband modulation CT8A11999NWhat is the name for emissions produced by an on/off keyed audio tone? RTTY MCW CW Phone BT8A12999NIf 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 DT8B01999NWhat is another name for a constant-amplitude radio-frequency signal? An RF carrier An AF carrier A sideband carrier A subcarrier AT8B02999NWhat 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 CT8B03999NWhat 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 AT8B04999NHow 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 BT8B05999NWhy 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 CT8B06999NWhy 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 DT8B07999NWhich 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 CT8B08999NWhat is the usual bandwidth of a single-sideband amateur signal? 1 kHz 2 kHz Between 3 and 6 kHz Between 2 and 3 kHz DT8B09999NWhat 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 CT8B10999NWhat is the usual bandwidth of UHF amateur fast-scan television? More than 6 MHz About 6 MHz About 3 MHz About 1 MHz BT8B11999NWhat is the result of over deviation in an FM transmitter? Increased transmitter power Out-of-channel emissions Increased transmitter range Poor carrier suppression BT8B12999NWhat 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 CT9A01999NWhat 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 CT9A02999NHow 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 AT9A03999NWhat 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 CT9A04999NHow many directly driven elements do most parasitic beam antennas have? None One Two Three BT9A05999NWhat 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 AT9A06999NWhat 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 DT9A07999NWhat 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 BT9A08999NWhat 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 AT9A09999NWhich of the following antennas is NOT an example of a parasitic beam? A quad A Yagi A collinear array A delta loop CT9A10999NWhat 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 DT9A11999NWhat 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 DT9A12999NIf 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 AT9B01999NWhat 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 BT9B02999NWhat 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 CT9B03999NWhat 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 CT9B04999NWhat electromagnetic-wave polarization does a Yagi antenna have when its elements are parallel to the Earth's surface? Circular Helical Horizontal Vertical CT9B05999NWhat electromagnetic-wave polarization does a half-wavelength antenna have when it is perpendicular to the Earth's surface? Circular Horizontal Parabolical Vertical DT9B06999NWhat electromagnetic-wave polarization does most man-made electrical noise have in the HF and VHF spectrum? Horizontal Left-hand circular Right-hand circular Vertical DT9B07999NWhat electromagnetic-wave polarization do most repeaters have in the VHF and UHF spectrum? Horizontal Vertical Right-hand circular Left-hand circular BT9B08999NWhat electromagnetic-wave polarization is used for most satellite operation? Only horizontal Only vertical Circular No polarization CT9B09999NWhat 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 DT9B10999NWhy 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 CT9B11999NWhat 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 AT9B12999NWhat 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 BT9B13999NWhat 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 CT9B14999NWhat 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 AT9B15999NWhat 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 CT9B16999NWhat 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 DT9B17999NWhat device can be installed to feed a balanced antenna with an unbalanced feed line? A balun A loading coil A triaxial transformer A wavetrap AT9B18999NWhich 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 CT9C01999NWhat 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 BT9C02999NWhat 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 AT9C03999NWhich 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 BT9C04999NIf 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 AT9C05999NIf 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 CT9C06999NAs 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 BT9C07999NAs 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 BT9C08999NIf 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 DT9C09999NWhy 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 AT9C10999NWhich 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 CT9C11999NWhy 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 BT0A01999NWhy 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 BT0A02999NOver 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 DT0A03999NWhat 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 CT0A04999NHow 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 BT0A05999NIn 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 CT0A06999NIn 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 DT0A07999NIn 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 CT0A08999NWhy 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 permissibleexposure 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 AT0A09999NWhy 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 AT0A10999NWhy 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 DT0A11999NWhy 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 AT0B01999NWhat 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 CT0B02999NWhich of the following terms best describe RF radiation? Cohesive radiation Ionizing radiation Nonionizing radiation Impulse radiation CT0B03999NWhy 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 BT0B04999NOn 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) DT0B05999NWhy 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 CT0B06999NWhy 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 AT0B07999NWhy 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 BT0B08999NWhy 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 CT0B09999NWhy 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 DT0B10999NWhich 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 CT0B11999NFrom 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 DT0B12999NWhat 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 AT0C01999YReferring 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 AT0C02999YReferring 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 BT0C03999YReferring 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 CT0C04999YReferring 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 DT0C05999YReferring 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 AT0C06999YReferring 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 BT0C07999NOn 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 DT0C08999NOn 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 DT0C09999NWhere 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 CT0C10999NWhat 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 levelsEach 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 AT0C11999NWhich 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 BT0C12999NWhy 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 CT0C13999NUsing 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 CT0C14999NUsing 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 BT0C15999NUsing 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 AT0C16999NWhat 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 AT0C17999NUsing 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 AT0C18999NUsing 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 AT0C19999NUsing 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 BT0C20999NWhat 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 CT0C21999NWhat 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 BT0C22999NUsing 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 AT0D01999NIf 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 AT0D02999NWhich 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 CT0D03999NIn 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 CT0D04999NIs 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 DT0D05999YWhich 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 AT0D06999YWhich 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 BT0D07999YWhich 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 CT0D08999YWhich 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 CT0D09999YWhich 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 AT0D10999YFor 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 BT0D11999YWhich 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 DT0D12999NUsing 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 AT0D13999NUsing 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 AT0D14999NUsing 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 BT0D15999NUsing 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 BT0D16999NUsing 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 CT0D17999NUsing 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 BT0D18999NUsing 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 BT0D19999NUsing 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 CT0D20999NUsing 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 AT0D21999NUsing 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 BT0D22999NUsing 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 BT0D23999NUsing 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 AT0E01999NFor 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 BT0E02999NWhat 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 CT0E03999NWhy 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 CT0E04999NWhat 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 BT0E05999NConsidering 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 CT0E06999NWhich 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 DT0E07999NWhich 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 DT0E08999NWhich 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 DT0E09999NWhy 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 AT0E10999NWhat 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 BT0E11999NWhat 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 CT0E12999NUsing 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 AT0E13999NUsing 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 BT0E14999NUsing 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 BT0E15999NUsing 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 BT0E16999NUsing 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 CT0E17999NUsing 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 CT0E18999NUsing 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 DT0E19999NUsing 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 BT0E20999NUsing 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 AT0E21999NUsing 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 DT0E22999NUsing 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 CT0E23999NUsing 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 AT0E24999NUsing 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 DT0E25999NUsing 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 watts287.4 feet 166 feet 127 feet 232 feet AT0E26999NUsing 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 CT0E27999NUsing 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 DT0E28999NUsing 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? 203.3 feet 127 feet 371.1 feet 232 feet A
