arrl T4 questions.txt

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  1. Which of the following is true concerning the microphone connectors on amateur transceivers?
    A. All transceivers use the same microphone connector type
    B. Some connectors include push-to-talk and voltages for powering the microphone
    C. All transceivers using the same connector type are wired identically
    D. Un-keyed connectors allow any microphone to be connected
  2. What could be used in place of a regular speaker to help you copy signals in a noisy area?
    A. A video display
    B. A low pass filter
    C. A set of headphones
    D. A boom microphone
  3. Which is a good reason to use a regulated power supply for communications equipment?
    A. It prevents voltage fluctuations from reaching sensitive circuits
    B. A regulated power supply has FCC approval
    C. A fuse or circuit breaker regulates the power
    D. Power consumption is independent of load
  4. Where must a filter be installed to reduce harmonic emissions?
    A. Between the transmitter and the antenna
    B. Between the receiver and the transmitter
    C. At the station power supply
    D. At the microphone
  5. What type of filter should be connected to a TV receiver as the first step in trying to prevent RF overload from a nearby 2 meter transmitter?
    A. Low-pass filter
    B. High-pass filter
    C. Band-pass filter
    D. Band-reject filter
  6. Which of the following would be connected between a transceiver and computer in a packet radio station?
    A. Transmatch
    B. Mixer
    C. Terminal node controller
    D. Antenna
  7. How is the computer’s sound card used when conducting digital communications using a computer?
    A. The sound card communicates between the computer CPU and the video display
    B. The sound card records the audio frequency for video display
    C. The sound card provides audio to the microphone input and converts received audio to digital form
    D. All of these choices are correct
  8. Which type of conductor is best to use for RF grounding?
    A. Round stranded wire
    B. Round copper-clad steel wire
    C. Twisted-pair cable
    D. Flat strap
  9. Which would you use to reduce RF current flowing on the shield of an audio cable?
    A. Band-pass filter
    B. Low-pass filter
    C. Preamplifier
    D. Ferrite choke
  10. What is the source of a high-pitched whine that varies with engine speed in a mobile transceiver’s receive audio?
    A. The ignition system
    B. The alternator
    C. The electric fuel pump
    D. Anti-lock braking system controllers
  11. Where should a mobile transceiver’s power negative connection be made?
    A. At the battery or engine block ground strap
    B. At the antenna mount
    C. To any metal part of the vehicle
    D. Through the transceiver’s mounting bracket
  12. What may happen if a transmitter is operated with the microphone gain set too high?
    A. The output power might be too high
    B. The output signal might become distorted
    C. The frequency might vary
    D. The SWR might increase
  13. Which of the following can be used to enter the operating frequency on a modern transceiver?
    A. The keypad or VFO knob
    B. The CTCSS or DTMF encoder
    C. The Automatic Frequency Control
    D. All of these choices are correct
  14. What is the purpose of the squelch control on a transceiver?
    A. To set the highest level of volume desired
    B. To set the transmitter power level
    C. To adjust the automatic gain control
    D. To mute receiver output noise when no signal is being received
  15. What is a way to enable quick access to a favorite frequency on your transceiver?
    A. Enable the CTCSS tones
    B. Store the frequency in a memory channel
    C. Disable the CTCSS tones
    D. Use the scan mode to select the desired frequency
  16. Which of the following would reduce ignition interference to a receiver?
    A. Change frequency slightly
    B. Decrease the squelch setting
    C. Turn on the noise blanker C
    D. Use the RIT control
  17. Which of the following controls could be used if the voice pitch of a single-sideband signal seems too high or low?
    A. The AGC or limiter
    B. The bandwidth selection
    C. The tone squelch
    D. The receiver RIT or clarifier
  18. What does the term "RIT" mean?
    A. Receiver Input Tone
    B. Receiver Incremental Tuning
    C. Rectifier Inverter Test
    D. Remote Input Transmitter
  19. What is the advantage of having multiple receive bandwidth choices on a multimode transceiver?
    A. Permits monitoring several modes at once
    B. Permits noise or interference reduction by selecting a bandwidth matching the mode
    C. Increases the number of frequencies that can be stored in memory
    D. Increases the amount of offset between receive and transmit frequencies
  20. Which of the following is an appropriate receive filter to select in order to minimize noise and interference for SSB reception?
    A. 500 Hz
    B. 1000 Hz
    C. 2400 Hz
    D. 5000 Hz
  21. Which of the following is an appropriate receive filter to select in order to minimize noise and interference for CW reception?
    A. 500 Hz
    B. 1000 Hz
    C. 2400 Hz
    D. 5000 Hz
  22. Which of the following describes the common meaning of the term “repeater offset”?
    A. The distance between the repeater’s transmit and receive antennas
    B. The time delay before the repeater timer resets
    C. The difference between the repeater’s transmit and receive frequencies
    D. The maximum frequency deviation permitted on the repeater’s input signal

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arrl T4 questions.txt
2014-04-25 13:53:10
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