HAM Radio 3.2/Ham Radio Version 3.2 (Chestnut CD-ROMs)(1993).ISO/exam/nov20/nov8.dat

Text File | 1991-11-20 | 18KB | 433 lines

294G-1-1.4 A 5-3   Something to TRANSmit and reCEIVE(R)
What is the unlabeled block (?) in this diagram?
                                           ┌────────┐
                                         ┌─┤ DIPOLE │
┌─────────┐    ┌────────┐    ┌─────────┐ │ └────────┘
│         │    │  SWR   │    │ ANTENNA ├─┘ ┌────────┐
│    ?    ├────┤ BRIDGE ├────┤ SWITCH  ├───┤  BEAM  │
│         │    │        │    │         ├┐  └────────┘
└─────────┘    └────────┘    └─────────┘│  ┌─────────┐
                                        └──┤  DUMMY  │
A. Transceiver                             │  LOAD   │
B. A TR switch                             └─────────┘
C. An antenna tuner
D. A modem
*
295G-1-1.5 D 5-3   The block that is open to the air
In block diagram 2G-1, which symbol represents an antenna?
                                              \  │  /
  ┌─────────┐    ┌─────────┐    ┌─────────┐     \│/ 4
  │         │    │         │    │         │      │
  │    1    ├────┤    2    ├────┤    3    ├──────┘
  │         │    │         │    │         │
  └─────────┘    └─────────┘    └─────────┘
A. 1
B. 2           FIGURE 2G-1
C. 3
D. 4
*
296G-1-2.1 B 5-3   Only 1 antenna at a time |may be used so an antenna|switch is required
What is the unlabeled block (?) in this diagram?
                                            ┌────────┐
                                          ┌─┤ DIPOLE │
┌───────────┐   ┌────────┐    ┌─────────┐ │ └────────┘
│TRANSMITTER│   │  SWR   │    │         ├─┘ ┌────────┐
│           ├───┤ BRIDGE ├────┤    ?    ├───┤  BEAM  │
│           │   │        │    │         ├┐  └────────┘
└───────────┘   └────────┘    └─────────┘│  ┌─────────┐
                                         └──┤  DUMMY  │
A. A pi network                             │  LOAD   │
B. An antenna switch                        └─────────┘
C. A key click filter
D. A mixer
*
297G-1-2.2 A 5-4   Usually a coaxial relay is used as a |a TR switch if the switch is external|to the transmitter
What is the unlabeled block (?) in this diagram?
A. A TR switch                                           ANTENNA
B. A variable frequency oscillator          ┌─────────┐    \│/
C. A linear amplifier              ┌────────┤ ANTENNA ├─────┘
D. A microphone                    │        │ TUNER   │
                                   │        └─────────┘
                              ┌────┴────┐
                              │   SWR   │
                              │ BRIDGE  │
                              └────┬────┘
┌───────┐   ┌─────────────┐   ┌────┴────┐   ┌──────────┐
│  KEY  ├───┤ TRANSMITTER ├───┤    ?    ├───┤ RECEIVER │
│       │   │             │   │         │   │          │
└───────┘   └─────────────┘   └─────────┘   └──────────┘
*
298G-1-2.3 B 5-3   An impedance-matching network|like an antenna tuner
What is the unlabeled block (?) in this diagram?
                                                ANTENNA
                                                  \│/
                                                   │
                                        FEED LINE─│
  ┌───────────┐    ┌─────────┐    ┌─────────┐      │
  │           │    │   SWR   │    │         │      │
  │TRANSCEIVER├────┤ BRIDGE  ├────┤    ?    ├──────┘
  │           │    │         │    │         │
  └───────────┘    └─────────┘    └─────────┘
A. An antenna switch
B. An impedance-matching network
C. A key click filter
D. A terminal-node controller
*
299G-1-2.4 D 5-3   An impedance-matching network|like an antenna tuner
In block diagram 2G-1, if component 1 is a transceiver and
component 2 is an SWR meter, what is component 3?
A. A power supply
B. A receiver
C. A microphone
D. An impedance-matching device
                                              \  │  /
  ┌─────────┐    ┌─────────┐    ┌─────────┐     \│/ 4
  │         │    │         │    │         │      │
  │    1    ├────┤    2    ├────┤    3    ├──────┘
  │         │    │         │    │         │
  └─────────┘    └─────────┘    └─────────┘
                 FIGURE 2G-1
*
300G-1-2.5 D 5-3   Need RF power to operate the SWR|meter so block one would have to|be a transmitter or transceiver
In block diagram 2G-1, if component 2 is an SWR meter and component
3 is an impedance-matching device, what is component 1?
A. A power supply
B. An antenna
C. An antenna switch
D. A transceiver
                                              \  │  /
  ┌─────────┐    ┌─────────┐    ┌─────────┐     \│/ 4
  │         │    │         │    │         │      │
  │    1    ├────┤    2    ├────┤    3    ├──────┘
  │         │    │         │    │         │
  └─────────┘    └─────────┘    └─────────┘
                 FIGURE 2G-1
*
301G-2.1   B 5-4   Key
In an amateur station designed for Morse radiotelegraph
operation, what station accessory will you need to go
with your transmitter?
A. A terminal-node controller
B. A telegraph key
C. An SWR meter
D. An antenna switch
*
302G-2.2   C 5-4   Key
What is the unlabeled block (?) in this diagram of a Morse
telegraphy station?
A. A sidetone oscillator        ANTENNA
B. A microphone                   \│/
C. A telegraph key                 │
D. A DTMF keypad      FEED LINE───│
                              ┌────┴────┐
                              │   SWR   │
                              │ BRIDGE  │
                              └────┬────┘
                                   │
┌───────┐   ┌─────────────┐   ┌────┴────┐   ┌──────────┐
│   ?   ├───┤ TRANSMITTER ├───┤   TR    ├───┤ RECEIVER │
│       │   │             │   │  SWITCH │   │          │
└───────┘   └─────────────┘   └─────────┘   └──────────┘
*
303G-2.3   C 5-3   Keyer
What station accessory do many amateurs use to help form good
Morse code characters?
A. A sidetone oscillator
B. A key-click filter
C. An electronic keyer
D. A DTMF keypad
*
304G-3.1   D 5-4   Mic
In an amateur station designed for radio-telephone
operation, what station accessory will you need to
go with your transmitter?
A. A splatter filter
B. A terminal-voice controller
C. A receiver audio filter
D. A microphone
*
305G-3.2   D 5-4   Mic
What is the unlabeled block (?) in this diagram of a
radiotelephone station?
A. A splatter filter
B. A terminal-voice controller          ANTENNA
C. A receiver audio filter                \│/
D. A microphone                            │
                              FEED LINE───│
                                           │
┌─────┐  ┌─────────────┐  ┌────────┐  ┌────┴────┐  ┌──────────┐
│  ?  ├──┤ TRANSMITTER ├──┤   SWR  ├──┤   TR    ├──┤ RECEIVER │
│     │  │             │  │ BRIDGE │  │  SWITCH │  │          │
└─────┘  └─────────────┘  └────────┘  └─────────┘  └──────────┘
*
306G-4.1   A 5-5   Some to generate the modulation |like a computer and something to|MOulate & DEModulate the carrier
In an amateur station designed for radioteletype operation, what
station accessories will you need to go with your transmitter?
A. A modem and a teleprinter or computer system
B. A computer, a printer and a RTTY refresh unit
C. A terminal-node controller
D. A modem, a monitor and a DTMF keypad
*
307G-4.2   C 5-5   MOdulator-DEModulator
What is the unlabeled block (?) in this diagram?
A. An RS-232 interface
B. SWR bridge                               ANTENNA
C. Modem                                      \│/
D. Terminal-network controller                 │
                                  FEED LINE───│
                                               │
    ┌──────────┐  ┌─────────┐  ┌───────────┐   │
    │ COMPUTER ├──┤    ?    ├──┤TRANSCEIVER├───┘
    │  SYSTEM  │  │         │  │           │
    └──────────┘  └─────────┘  └───────────┘
*
308G-5.1   A 5-5   Controller
In a packet-radio station, what device connects between the
radio transceiver and the computer terminal?
A. A terminal-node controller
B. An RS-232 interface
C. A terminal refresh unit
D. A tactical network control system
*
309G-5.2   A 5-6   Controller
What is the unlabeled block (?) in this diagram of a
packet-radio station?
A. A terminal-node controller
B. An RS-232 interface                      ANTENNA
C. A terminal refresh unit                    \│/
D. A tactical network control system           │
                                  FEED LINE───│
                                               │
    ┌──────────┐  ┌─────────┐  ┌───────────┐   │
    │ COMPUTER ├──┤    ?    ├──┤TRANSCEIVER├───┘
    │  SYSTEM  │  │         │  │           │
    └──────────┘  └─────────┘  └───────────┘
*
310G-5.3   C 5-5   Between the computer and the radio
Where does a terminal-node controller connect in an amateur
packet-radio station?
A. Between the antenna and the radio
B. Between the computer and the monitor
C. Between the computer or terminal and the radio
D. Between the keyboard and the computer
*
311H-1-1.1 B 2-7   CW, emission type A1A uses ON/OFF|keying of an RF signal
What keying method is used to transmit CW?
A. Frequency-shift keying of a radio-frequency signal
B. On/off keying of a radio-frequency signal
C. Audio-frequency-shift keying of an oscillator tone
D. On/off keying of an audio-frequency signal
*
312H-1-1.2 C 2-7   CW
What emission type describes international Morse code telegraphy
messages?
A. RTTY
B. Image
C. CW
D. Phone
*
313H-1-2.1 A 2-7   RTTY is used for radioteletype
What emission type describes narrow-band direct-printing
telegraphy messages?
A. RTTY
B. Image
C. CW
D. Phone
*
314H-1-2.2 A 2-7   FSK, frequency-shift keying|is used to transmit RTTY
What keying method is used to transmit RTTY messages?
A. Frequency-shift keying of a radio-frequency signal
B. On/off keying of a radio-frequency signal
C. Digital pulse-code keying of an unmodulated carrier
D. On/off keying of an audio-frequency signal
*
315H-1-3.1 A 2-7   FM phone
What emission designator describes frequency-modulated voice
transmissions?
A. FM phone
B. Image
C. CW
D. Single-sideband phone
*
316H-1-4.1 D 2-7   Single-sideband phone
What emission designator describes single-sideband
suppressed-carrier (SSB) voice transmissions?
A. FM phone
B. Image
C. CW
D. Single-sideband phone
*
317H-2.1   B 10-6  Straight ON/OFF keying (CW) that has|no filtering in the keying circuits |produces a square waveform
What does the term key click mean?
A. The mechanical noise caused by closing a straight key
   too hard
B. The clicking noise from an excessively square CW keyed
   waveform
C. The sound produced in a receiver from a CW signal faster
   than 20 WPM
D. The sound of a CW signal being copied on an AM receiver
*
318H-2.2   D 10-6  Straight ON/OFF keying (CW) that has|no FILTERING in the keying circuits |produces a square waveform
How can key clicks be eliminated?
A. By reducing your keying speed to less than 20 WPM
B. By increasing power to the maximum allowable level
C. By using a power supply with better regulation
D. By using a key-click filter
*
319H-3.1   C 10-6  Slight frequency shift each time the|transmitter is keyed, sometimes due |to poor voltage regulation in the PS
What does the term chirp mean?
A. A distortion in the receiver audio circuits
B. A high-pitched audio tone transmitted with a CW signal
C. A slight shift in oscillator frequency each
   time a CW transmitter is keyed
D. A slow change in transmitter frequency as the circuit
   warms up
*
320H-3.2   B 10-6  Regulate the power supply voltages|especially the supply to the osc. |& the the stage following the osc.
What can be done to the power supply of a CW transmitter
to avoid chirp?
A. Resonate the power supply filters
B. Regulate the power supply output voltages
C. Use a buffer amplifier between the transmitter output
   and the feed line
D. Hold the power supply current to a fixed value
*
321H-4.1   D 10-7  Too low a line voltage or not enough |filtering in the power supply because|of a defective filter capacitor
What is a common cause of superimposed hum?
A. Using a nonresonant random-wire antenna
B. Sympathetic vibrations from a nearby transmitter
C. Improper neutralization of the transmitter output stage
D. A defective filter capacitor in the power supply
*
322H-4.2   B 10-7  There will be less filtering and|there might be hum on the signal
What type of problem can a bad power-supply filter capacitor
cause in a transmitter or receiver?
A. Sympathetic vibrations in nearby receivers
B. A superimposed hum or buzzing sound
C. Extreme changes in antenna resonance
D. Imbalance in the mixers
*
323H-5.1   A 10-1  Harmonics are 2, 3, etc. times|the signal      7160*4 = 28640
What is the 4th harmonic of a 7160-kHz signal?
A. 28,640 kHz
B. 35,800 kHz
D. 28,160 kHz
D. 1790 kHz
*
324H-5.2   C 10-1  Harmonics are 2, 3, etc. times the|signal.   21375/7125 = 3   You are|radiating a third harmonic
You receive an FCC Notice of Violation stating that your station
was heard on 21,375 kHz.  At the time listed on the notice, you
were operating on 7125 kHz.  What is a possible cause of this
violation?
A. Your transmitter has a defective power-supply filter capacitor
B. Your CW keying speed was excessively fast
C. Your transmitter was radiating excess harmonic signals
D. Your transmitter has a defective power-supply filter choke
*
325H-6.1   A 8-11  The tissue becomes cooked|like in a microwave oven
What may happen to body tissues that are exposed to large
amounts of UHF or microwave RF energy?
A. The tissue may be damaged because of the heat produced
B. The tissue may suddenly be frozen
C. The tissue may be immediately destroyed because of the
   Maxwell Effect
D. The tissue may become less resistant to cosmic radiation
*
326H-6.2   C 8-11  It is an good idea to secure the |transmitter before working on ANY|antenna or tower!
What precaution should you take before working near a high-gain
UHF or microwave antenna (such as a parabolic, or dish antenna)?
A. Be certain the antenna is FCC type accepted
B. Be certain the antenna and transmitter are properly grounded
C. Be certain the transmitter cannot be operated
D. Be certain the antenna safety interlocks are in place
*
327H-6.3   A 8-11  Locating the antenna in the middle|of the roof will give best pattern|and minimize RF exposure
You are installing a VHF or UHF mobile radio in your vehicle.
What is the best location to mount the antenna on the vehicle
to minimize any danger from RF exposure to the driver or
passengers?
A. In the middle of the roof
B. Along the top of the windshield
C. On either front fender
D. On the trunk lid
*
328H-7.1   C 10-3  Oscillation due to improper|neutralization of the power|amplifier
You discover that your tube-type transmitter power amplifier is
radiating spurious emissions.  What is the most likely cause of
this problem?
A. Excessively fast keying speed
B. Undermodulation
C. Improper neutralization
D. Tank-circuit current dip at resonance
*
329H-7.2   D 10-1  The FCC uses the term spurious  |emission to describe out-of-band|signals
Your transmitter radiates signals outside the amateur band where
you are transmitting.  What term describes this radiation?
A. Off-frequency emissions
B. Transmitter chirp
C. Incidental radiation
D. Spurious emissions
*
330H-7.3   A 10-6  Mixing products or intermediate |frequencies might be radiated as|spurious emissions
What problem can occur if you operate your transmitter without the
cover and other shielding in place?
A. Your transmitter can radiate spurious emissions
B. Your transmitter may radiate a "chirpy" signal
C. The final amplifier efficiency of your transmitter may decrease
D. You may cause splatter interference to other stations operating
   on nearby frequencies
*
331H-7.4   B 9-20  Spatter
What type of interference will you cause if you operate your SSB
transmitter with the microphone gain adjusted too high?
A. You may cause digital interference to computer equipment in
   your neighborhood
B. You may cause splatter interference to other stations operating
   on nearby frequencies
C. You may cause atmospheric interference in the air around your
   antenna
D. You may cause processor interference to the microprocessor in
   your rig
*
332H-7.5   B 9-20  You will over-deviate the transmitter |and drop-out of the repeater and cause|interference to nearby frequencies
What may happen if you adjust the microphone gain or deviation
control on your FM transmitter too high?
A. You may cause digital interference to computer equipment in
   your neighborhood
B. You may cause interference to other stations operating on
   nearby frequencies
C. You may cause atmospheric interference in the air around your
   antenna
D. You may cause processor interference to the microprocessor
   in your rig
*
333H-7.6   B 9-20  Splatter
What type of interference can excessive amounts of speech
processing in your SSB transmitter cause?
A. You may cause digital interference to computer equipment
   in your neighborhood
B. You may cause splatter interference to other stations
   operating on nearby frequencies
C. You may cause atmospheric interference in the air around
   your antenna
D. You may cause processor interference to the microprocessor
   in your rig
*
334I-1.1   A 7-7   Length for dipole is 468 divided by|F in MHz,    468/3.725 = 125.6 feet
What is the approximate length (in feet) of a half-wavelength
dipole antenna for 3725 kHz?
A. 126 ft
B. 81 ft
C. 63 ft
D. 40 ft
*
335I-1.2   D 7-7   Length for dipole is 468 divided by|F in MHz,  468/7.125 = 65.7 feet
What is the approximate length (in feet) of a half-wavelength
dipole antenna for 7125 kHz?
A. 84 ft
B. 42 ft
C. 33 ft
D. 66 ft
*