3d1x5 Volume 2 (Ure)

124 Questions | Total Attempts: 206

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CDCs Quizzes & Trivia

Volume 2 for 3D1X5 CDCs


Questions and Answers
  • 1. 
    The airport surveillance radar (ASR) is used in which air traffic control (ATC) radar mission?
    • A. 

      Local control

    • B. 

      Terminal control area

    • C. 

      Air route traffic control

    • D. 

      Precision approach radar control

  • 2. 
    Azimuth resolution is directly related to what radar set characteristic?
    • A. 

      Pulse recurrence frequency

    • B. 

      Transmitted pulse width

    • C. 

      Pulse recurrence time

    • D. 

      Antenna beam width

  • 3. 
    The airport surveillance radar transmitter site should be located more than ½ mile from the primary instrument approach path and touch-down point so that these areas
    • A. 

      Fall within receiver recovery time

    • B. 

      Fall within processor recovery time

    • C. 

      Do not fall within receiver recovery time

    • D. 

      Do not fall within processor recovery time

  • 4. 
    The point designated as touchdown for a precision approach radar (PAR) is normally how many feet from the end of the runway?
    • A. 

      500 exclusive of any overruns

    • B. 

      500 inclusive of any overruns

    • C. 

      1,000 exclusive of any overruns

    • D. 

      1,000 inclusive of any overruns

  • 5. 
    Siting a precision approach radar (PAR) for multiple runway approaches can cause you to locate the unit outside the optimum coverage areas. If this occurs what would be the best location for the radar system?
    • A. 

      No location is best; do not install the PAR

    • B. 

      At the center point between runway overruns

    • C. 

      A position where it gives limited coverage to all of your runways

    • D. 

      A position where it gives the best coverage to your most important runway

  • 6. 
    In the AN/GPN–22 precision approach radar (PAR) system, frequency diversity is used in the scan mode to eliminate
    • A. 

      Weather returns

    • B. 

      Large target fluctuations only

    • C. 

      Large target fluctuations and weather returns

    • D. 

      Large target fluctuations and provide target enhancement

  • 7. 
    In the AN/GPN–22 precision approach radar (PAR) system, frequency diversity is accomplished by transmitting two 1 microsecond (μsec) pulses that are composed of two X-band frequencies separated by
    • A. 

      24 MHz

    • B. 

      37 MHz

    • C. 

      74 MHz

    • D. 

      124 MHz

  • 8. 
    In the AN/GPN–22 precision approach radar (PAR), the coherent and non-coherent input to the moving target indictor (MTI) detector is outputted as
    • A. 

      Unipolar video

    • B. 

      Bipolar video

    • C. 

      Canceled unipolar video

    • D. 

      Canceled bipolar video

  • 9. 
    Once a track is established in the AN/GPN–22 precision approach radar (PAR), what device uses error data obtained from the received signal to predict where the target will be during the next track interval?
    • A. 

      Target Data Computer (TDC)

    • B. 

      Signal Data Converter (SDC)

    • C. 

      Computer Data Entry Module (CDEM)

    • D. 

      Antenna Beam Position Control Unit (ABPCU)

  • 10. 
    How many narrow band filters does the AN/GPN–22 precision approach radar (PAR) employ to convert a shift in intermediate frequency (IF) to a range error signal?
    • A. 

      24

    • B. 

      37

    • C. 

      74

    • D. 

      137

  • 11. 
    In the AN/GPN–22 precision approach radar (PAR), the operational program is locked to the real-time radar operations by the interrupt command signal from the
    • A. 

      Dual channel receiver processor

    • B. 

      Antenna beam position unit

    • C. 

      Radar data transfer group

    • D. 

      Refresh memory

  • 12. 
    At what interval does the AN/GPN–22 precision approach radar’s (PAR) target data computer (TDC) perform system fault monitoring?
    • A. 

      Every pulse recurrence time (PRT)

    • B. 

      Once every 2 seconds

    • C. 

      Once per track interval

    • D. 

      At beam interrupt signal time

  • 13. 
    In the AN/GPN–22 precision approach radar (PAR), what are the three modes of operation with respect to data loop operation?
    • A. 

      Command, open-loop, closed-loop

    • B. 

      Diagnostic, operational, coherent

    • C. 

      Data point, closed-loop, self-test

    • D. 

      Command, input, and output

  • 14. 
    In the AN/GPN–22 precision approach radar (PAR), the data loop interface logic circuitry used in each of the subsystems is commonly called
    • A. 

      One’s complement

    • B. 

      Repeater logic

    • C. 

      Closed-loop

    • D. 

      Open-loop

  • 15. 
    The target data computer in the AN/GPN–22 precision approach radar (PAR) processes the site parameter panel data once
    • A. 

      Every track interval

    • B. 

      Per scan interval

    • C. 

      Every 2 seconds

    • D. 

      Per second

  • 16. 
    The AN/GPN–22 precision approach radar (PAR) required input voltage is 3-phase,
    • A. 

      110 volt, alternating current (VAC)

    • B. 

      110 volt, direct current (VDC)

    • C. 

      208 VAC

    • D. 

      208 VDC

  • 17. 
    AN/GPN–22 precision approach radar (PAR) emergency power is supplied by a
    • A. 

      12-volt, alternating current (VAC) battery

    • B. 

      12-volt, direct current (VDC) battery

    • C. 

      110-VDC battery

    • D. 

      208-VDC battery

  • 18. 
    On the AN/GPN–22 precision approach radar (PAR) radar set controls (RSC), an “OVER TEMP” fault lamp indicates
    • A. 

      Insufficient cooling

    • B. 

      Excessive current draw

    • C. 

      Excessive voltage production

    • D. 

      Excessive current draw or insufficient cooling

  • 19. 
    What capability makes the traveling wave tube (TWT) much more versatile than the magnetron?
    • A. 

      It is a remarkably stable oscillator

    • B. 

      It is a wide band amplifier and not an oscillator

    • C. 

      It is far more efficient at using repeller plate potential

    • D. 

      Its narrow bandwidth provides unsurpassed frequency stability

  • 20. 
    What is the original source of the continuous wave (CW) radio frequency (RF) drive in the AN/GPN–22 precision approach radar (PAR)?
    • A. 

      37-megahertz (MHz) crystal oscillator

    • B. 

      74-MHz crystal oscillator

    • C. 

      Stable local oscillator

    • D. 

      Local oscillator

  • 21. 
    In the AN/GPN–22 precision approach radar (PAR), the stabilized master oscillator (STAMO) multiplies the continuous wave (CW) transmitter drive signal to the
    • A. 

      L-band

    • B. 

      S-band

    • C. 

      W-band

    • D. 

      X-band

  • 22. 
    The purpose of the traveling wave tube (TWT) radar modulator A6 in the AN/GPN–22 precision approach radar (PAR) transmitter is to
    • A. 

      Provide voltage amplification and trigger shaping to the TWT modulator trigger

    • B. 

      Produce excitation voltage for the cathode of the TWT modulator trigger

    • C. 

      Modulate the incoming video for conversion to intermediate frequency (IF)

    • D. 

      Provide pulse shaping for stable master oscillator

  • 23. 
    In the scan mode, the AN/GPN–22 precision approach radar (PAR) can direct the radio frequency (RF) beam to how many separate beam positions?
    • A. 

      443

    • B. 

      439

    • C. 

      423

    • D. 

      421

  • 24. 
    Which of the following is an off-line test performed on the antenna position control unit (APCU) in the AN/GPN–22 precision approach radar (PAR)?
    • A. 

      Mode control

    • B. 

      Open loop

    • C. 

      Closed loop

    • D. 

      Rebound

  • 25. 
    The AN/GPN–22 precision approach radar’s (PAR) transmit/receive (T/R) section
    • A. 

      Filters out unwanted frequencies

    • B. 

      Provides amplification of the transmitted pulse

    • C. 

      Produces the second intermediate frequency

    • D. 

      Prevents receiver damage by the transmitter high-power pulse

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