2A533A Vol.3 Part 2

50 Questions | Total Attempts: 88

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2A533A Vol.3 Part 2 - Quiz

Preperation quiz for comm/nav mission systems journeyman


Questions and Answers
  • 1. 
    In a pulse-modulation radar system. the pulse repetition frequency is the number of pulses
    • A. 

      That are received within 1 second

    • B. 

      That are transmitted within 1 second

    • C. 

      That strike the target within 1 second

  • 2. 
    Which component in a pulse-modulation radar set provides the voltages that operate the other radar components?
    • A. 

      Antenna

    • B. 

      Transmitter

    • C. 

      Power supply

  • 3. 
    Which component in a pulse-modulation radar system shapes the radio-frequency energy into a narrow beam?
    • A. 

      Antenna

    • B. 

      Indicator

    • C. 

      Transmitter

  • 4. 
    What is produced in the pulse-modulation radar system by heterodyning?
    • A. 

      Very-low frequency

    • B. 

      Very-hight frequency

    • C. 

      Intermediate-frequency

  • 5. 
    The screen display on newer types of pulse modulation radar indicator is called
    • A. 

      A map

    • B. 

      A pulse

    • C. 

      A sweep

  • 6. 
    In a frequency-shift radar system, the doppler principle makes it possible to instantaneously sense and measure
    • A. 

      Altitude and ground track

    • B. 

      Target elevation and speed

    • C. 

      Ground speed and drift angle

  • 7. 
    In a frequency-shift radar system, what is the relationship between a transmitter/receiver and an aircraft when no frequency shift between them can be measured?
    • A. 

      They are a constant distance away form each other

    • B. 

      The aircraft is not reflection any of the radar pulses

    • C. 

      The aircraft is flying away from the transmitter/receiver

  • 8. 
    In a frequecny-shift radar system, what is the relationship between a transmitter/receiver and an aircraft when the received frequency is higher than the transmitted frequency?
    • A. 

      The aircraft is not reflecting any of the radar-pulses

    • B. 

      The aircraft is flying towards the transmitter receiver

    • C. 

      The aircraft is flying away from the transmitter receiver

  • 9. 
    In a frequency-shift radar system, what is the relationship between a transmitter/receiver and an aircraft when the received frequency is lower than the transmitted frequency?
    • A. 

      The aircraft is not reflecting any of the RDR pulses

    • B. 

      The aircraft is flying towards the RT

    • C. 

      The aircraft is flying away from the RT

  • 10. 
    The dimensions of a wave guide determine the wave guide's
    • A. 

      Frequency and phase shift and powerloss

    • B. 

      Frequency and power-handling capabilities

    • C. 

      Voltage standing wave ration and power-handling ability

  • 11. 
    The voltage standing-wave ration is determined by comparing the radars's
    • A. 

      Reflected power to the TX power

    • B. 

      Reflected power to the receiver's sensitivity

    • C. 

      Transmitter power to the receiver's sensitivity

  • 12. 
    What radar set component provides stabilized pitch and roll reference data for control of antenna orientation, despite changes in aircraft attitude?
    • A. 

      Am-853b

    • B. 

      C-1242a

    • C. 

      Cn-221a

  • 13. 
    Which radar set line replaceable unit performs highly accurate electronic beam steering?
    • A. 

      Radar transmitter

    • B. 

      Radar data terminal

    • C. 

      Low observable antenna

  • 14. 
    The part of the radar sets low observable antenna that is addressed to steer the radio-frequency beam is the
    • A. 

      Phase control modules

    • B. 

      Radio-frequency roll resolver

    • C. 

      Radio-frequency quadrant manifolds

  • 15. 
    To which item does the radar sets dual-channel beam steering controller selectively send digital phasing and polarization commands?
    • A. 

      Phase control module

    • B. 

      Roll electronics assembly

    • C. 

      Roll resolver power supply

  • 16. 
    The purpose of the keyed automatic gain control gate while the radar altimeter is in track mode is to
    • A. 

      Encompass and lock-on to the return video pulses

    • B. 

      Be timed to overlap return pulse leading edge

    • C. 

      Control the processing of the ground returns

  • 17. 
    Which radar altimeter mode is initiated when on insufficient amount of return video is present during the keyed gain control gate?
    • A. 

      Standby

    • B. 

      Ground map

    • C. 

      Search/loss of track

  • 18. 
    The radar altimeter test button provides the capability for testing the low-altitude fly-up circuits in the
    • A. 

      Radar data terminals and terrain following acu's

    • B. 

      Rdr data terminals and ground following acu's

    • C. 

      Tf acu's and delivery acu's

  • 19. 
    When is the radar altimeter height indicator OFF flag not displayed?
    • A. 

      The height indicator is turned off

    • B. 

      Power to the radar altimeter is lost

    • C. 

      The radar altimeter is tracking the terrain

  • 20. 
    Which radar application is used to produce a pictorial map of the terrain?
    • A. 

      Ground mapping

    • B. 

      Terrain-following

    • C. 

      Terrain avoidance

  • 21. 
    Which radar application is used primarily as an aid to navigation?
    • A. 

      Search

    • B. 

      Ground mapping

    • C. 

      Terrain-following

  • 22. 
    To achieve amplitude modulation, what device is used to ensure the output signal contains frequencies not present in the input signal?
    • A. 

      Power amp

    • B. 

      Balanced amp

    • C. 

      Non-linear amplifier

  • 23. 
    The frequencies created by the heterodyning process in an amplitude-modulated transmitter modulator are the
    • A. 

      Two original frequencies

    • B. 

      Sum of and difference between the tow original frequencies

    • C. 

      Sum of the two original frequencies and two original frequencies

  • 24. 
    In a frequency-modulated signal, the amount of frequency modulation is controlled by the modulating signals
    • A. 

      Frequency

    • B. 

      Amplitude

    • C. 

      Phase

  • 25. 
    In a frequency-modulated signal, the amount of separation between the sideband frequencies is equal to the
    • A. 

      Carrier frequency

    • B. 

      Rate of carrier swing

    • C. 

      Modulating frequency

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