3d1x5 Volume 2 (Ure)

124 Questions | Attempts: 206
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  • 1/124 Questions

    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?

    • No location is best; do not install the PAR
    • At the center point between runway overruns
    • A position where it gives limited coverage to all of your runways
    • A position where it gives the best coverage to your most important runway
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About This Quiz

Volume 2 for 3D1X5 CDCs

CDC Quizzes & Trivia

Quiz Preview

  • 2. 

    Radio frequency (RF) to the antenna makes the transition from fixed to rotating waveguide within the

    • Rotary joint

    • Slip rings

    • Polarizers

    • Feedhorn

    Correct Answer
    A. Rotary joint
  • 3. 

    What identifies and blanks returns from targets beyond the operating range of the radar?

    • Phase detector

    • Coherent canceller

    • Analog to digital converter

    • Second-time-around reduction circuits

    Correct Answer
    A. Second-time-around reduction circuits
  • 4. 

    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?

    • Target Data Computer (TDC)

    • Signal Data Converter (SDC)

    • Computer Data Entry Module (CDEM)

    • Antenna Beam Position Control Unit (ABPCU)

    Correct Answer
    A. Target Data Computer (TDC)
  • 5. 

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

    • It is a remarkably stable oscillator

    • It is a wide band amplifier and not an oscillator

    • It is far more efficient at using repeller plate potential

    • Its narrow bandwidth provides unsurpassed frequency stability

    Correct Answer
    A. It is a wide band amplifier and not an oscillator
  • 6. 

    In the AN/GPN–22 precision approach radar (PAR), the non-coherent mode of operation is used to

    • Cancel slow moving targets

    • Cancel the presence of rain only

    • Detect the outline of weather only

    • Detect a target in the presence of moving clutter such as rain

    Correct Answer
    A. Detect a target in the presence of moving clutter such as rain
  • 7. 

    The airport surveillance radar (ASR) is used in which air traffic control (ATC) radar mission?

    • Local control

    • Terminal control area

    • Air route traffic control

    • Precision approach radar control

    Correct Answer
    A. Terminal control area
  • 8. 

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

    • Insufficient cooling

    • Excessive current draw

    • Excessive voltage production

    • Excessive current draw or insufficient cooling

    Correct Answer
    A. Excessive current draw or insufficient cooling
  • 9. 

    In the dual redundant receiver of the AN/GPN–22 precision approach radar (PAR), which of the following best describes the fault hierarchy for the automatic fault testing?

    • The last module on the chain is tested first

    • The testing is randomly selected by the TDC

    • Modules are prewired to a fixed testing sequence

    • Modules that affect the testing of others are tested first

    Correct Answer
    A. Modules that affect the testing of others are tested first
  • 10. 

    What is used to regulate the output of the AN/GPN–20 airport surveillance radar (ASR) transmitter’s high voltage power supply?

    • Positive feedback loop

    • Negative feedback loop

    • Conduction time of six silicon controlled rectifiers (SCRs)

    • Conduction time of only three diodes

    Correct Answer
    A. Conduction time of six silicon controlled rectifiers (SCRs)
  • 11. 

    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

    • 24 MHz

    • 37 MHz

    • 74 MHz

    • 124 MHz

    Correct Answer
    A. 37 MHz
  • 12. 

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

    • Every pulse recurrence time (PRT)

    • Once every 2 seconds

    • Once per track interval

    • At beam interrupt signal time

    Correct Answer
    A. Once every 2 seconds
  • 13. 

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

    • One’s complement

    • Repeater logic

    • Closed-loop

    • Open-loop

    Correct Answer
    A. Repeater logic
  • 14. 

    All of the front panel switches in the special test section of the dual redundant receiver of the AN/GPN–22 precision approach radar (PAR) are disabled during normal operation except for the

    • LN/LM switch

    • Beam width switch

    • Preamplifier switch

    • Transmitter frequency switch

    Correct Answer
    A. LN/LM switch
  • 15. 

    The primary function of the refresh memory (RM) in the precision approach radar (PAR) indicator system is to

    • Clear the indicator when overloaded

    • Allow new data to be entered during operation

    • Allow the indicator to be reset during operation

    • Maintain a flicker-free presentation for the display

    Correct Answer
    A. Maintain a flicker-free presentation for the display
  • 16. 

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

    • Command, open-loop, closed-loop

    • Diagnostic, operational, coherent

    • Data point, closed-loop, self-test

    • Command, input, and output

    Correct Answer
    A. Command, input, and output
  • 17. 

    The AN/GPN–20 airport surveillance radar (ASR) provides emergency obstruction light operation for a minimum of

    • 30 seconds

    • 10 minutes

    • 30 minutes

    • 10 hours

    Correct Answer
    A. 10 minutes
  • 18. 

    The time necessary to quickly disconnect the transmitter and connect the receiver to the antenna is called

    • Transmitter/receiver (TR) recovery time

    • Transmitter recovery time

    • Processor recovery time

    • Receiver recovery time

    Correct Answer
    A. Transmitter/receiver (TR) recovery time
  • 19. 

    How will the final optimum tilt angle for the AN/GPN–20 airport surveillance radar (ASR) antenna be determined?

    • Survey only

    • Line of sight only

    • Survey and flight check

    • Line of sight and survey

    Correct Answer
    A. Survey and flight check
  • 20. 

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

    • 110 volt, alternating current (VAC)

    • 110 volt, direct current (VDC)

    • 208 VAC

    • 208 VDC

    Correct Answer
    A. 208 VAC
  • 21. 

    What receiver parameter does minimum discernable signal (MDS) check?

    • Balance

    • Receiver sensitivity

    • None, it is a transmitter test

    • Voltage standing wave ratio (VSWR)

    Correct Answer
    A. Receiver sensitivity
  • 22. 

    What is the primary advantage of having two operator keyboards for each control indicator group?

    • Provides a backup keyboard in the event of master indicator keyboard failure

    • Enables the lead controller to override a trainee’s incorrect data entry during routine air traffic training

    • Enables the on-duty chief controller to invoke system inquiries without encroachment to the drop/suspend list priority

    • Enables one controller to “work” active traffic and the remaining controller to perform flight data entry/modification, handoffs, etc

    Correct Answer
    A. Enables one controller to “work” active traffic and the remaining controller to perform flight data entry/modification, handoffs, etc
  • 23. 

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

    • Every track interval

    • Per scan interval

    • Every 2 seconds

    • Per second

    Correct Answer
    A. Every 2 seconds
  • 24. 

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

    • L-band

    • S-band

    • W-band

    • X-band

    Correct Answer
    A. X-band
  • 25. 

    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?

    • 443

    • 439

    • 423

    • 421

    Correct Answer
    A. 439
  • 26. 

    What is a measure of the ability to detect a small moving target in ground clutter?

    • Stationary cancellation velocity

    • Sub-cancellation velocity

    • Sensitivity time control

    • Subclutter visibility

    Correct Answer
    A. Subclutter visibility
  • 27. 

    For how many minutes is the AN/GPN–20 airport surveillance radar (ASR) control memory energized by the temporary power supply when a power failure occurs?

    • 10

    • 15

    • 20

    • 25

    Correct Answer
    A. 10
  • 28. 

    Azimuth resolution is directly related to what radar set characteristic?

    • Pulse recurrence frequency

    • Transmitted pulse width

    • Pulse recurrence time

    • Antenna beam width

    Correct Answer
    A. Antenna beam width
  • 29. 

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

    • 500 exclusive of any overruns

    • 500 inclusive of any overruns

    • 1,000 exclusive of any overruns

    • 1,000 inclusive of any overruns

    Correct Answer
    A. 1,000 exclusive of any overruns
  • 30. 

    The AN/GPN–20 airport surveillance radar (ASR) primary power input is 3-phase,

    • 110 volts alternating current (VAC)

    • 120 volts direct current (VDC)

    • 120/208 VAC

    • 110/208 VDC

    Correct Answer
    A. 120/208 VAC
  • 31. 

    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

    • Fall within receiver recovery time

    • Fall within processor recovery time

    • Do not fall within receiver recovery time

    • Do not fall within processor recovery time

    Correct Answer
    A. Do not fall within receiver recovery time
  • 32. 

    Which converter is used in both the AN/GPN–22 precision approach radar (PAR) shelter and radar approach control (RAPCON) remoting equipment to convert the parallel 32-bit data words to serial data and back again?

    • Digital-to-digital (D/D)

    • Analog-to-digital (A/D)

    • Digital-to-analog (D/A)

    • Analog-to-analog (A/A)

    Correct Answer
    A. Digital-to-digital (D/D)
  • 33. 

    After initial turn-on, what is the recommended warm-up period for the AN/UPM–145 Radar Test Set before performing any tests?

    • None

    • 5 minutes

    • 10 minutes

    • 24 hours

    Correct Answer
    A. 5 minutes
  • 34. 

    In dual frequency diversity mode, the overall AN/GPN–20 airport surveillance radar (ASR) system timing is derived from the

    • Selected master channel

    • Individual channel’s processors

    • Selected master stable local oscillator

    • Individual channel’s stable local oscillator

    Correct Answer
    A. Selected master channel
  • 35. 

    To change the AN/GPN–20 airport surveillance radar (ASR) receiver stable local oscillator (STALO) frequency you must

    • Manually tune the resonate oscillator

    • Change the internal very high frequency (VHF) oscillator crystal

    • Manually adjust the reflex klystron repeller voltage

    • Change the capacitors of the voltage controlled oscillator

    Correct Answer
    A. Change the internal very high frequency (VHF) oscillator crystal
  • 36. 

    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?

    • 24

    • 37

    • 74

    • 137

    Correct Answer
    A. 24
  • 37. 

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

    • 12-volt, alternating current (VAC) battery

    • 12-volt, direct current (VDC) battery

    • 110-VDC battery

    • 208-VDC battery

    Correct Answer
    A. 12-volt, direct current (VDC) battery
  • 38. 

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

    • 37-megahertz (MHz) crystal oscillator

    • 74-MHz crystal oscillator

    • Stable local oscillator

    • Local oscillator

    Correct Answer
    A. 37-megahertz (MHz) crystal oscillator
  • 39. 

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

    • Provide voltage amplification and trigger shaping to the TWT modulator trigger

    • Produce excitation voltage for the cathode of the TWT modulator trigger

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

    • Provide pulse shaping for stable master oscillator

    Correct Answer
    A. Provide voltage amplification and trigger shaping to the TWT modulator trigger
  • 40. 

    In the AN/GPN–22 precision approach radar (PAR) remoting system, which channel is not remoted to the radar unit?

    • Voice

    • Digital

    • Analog

    • Video/triggers/data

    Correct Answer
    A. Video/triggers/data
  • 41. 

    In remoting signals, line attenuation is greatest at the

    • Higher frequencies

    • Intermediate and higher frequencies

    • Lower frequencies

    • Intermediate and lower frequencies

    Correct Answer
    A. Higher frequencies
  • 42. 

    What effectively eliminates moving target indicator (MTI) blind speeds at the speeds seen in air traffic control?

    • Staggered pulse repetition frequency (PRF)

    • Non-staggered PRF

    • MTI second-time-around reduction circuits

    • Normal second-time-around reduction circuits

    Correct Answer
    A. Staggered pulse repetition frequency (PRF)
  • 43. 

    Blind speed is a target speed at which successive radar returns changes phase by

    • 45

    • 90

    • 135

    • 180

    Correct Answer
    A. 180
  • 44. 

    In the programmable indicator data processor (PIDP) II, what service does the low-altitude alerting system perform?

    • When a tracked target enters one of 1,024 geographic sectors and is at or below the altitude set for the sector, the tracked target begins to flash and the audible alarm is sounded

    • When a tracked target enters an absolute minimum altitude setting within the service volume, the tracked symbol begins to flash and the audible alarm sounds

    • It transfers low-altitude information related to specific tracked targets to receiving centers throughout the controlled airspace

    • It warns the operator whenever tracked targets within the drop/suspend parameter drop below a predetermined altitude

    Correct Answer
    A. When a tracked target enters one of 1,024 geographic sectors and is at or below the altitude set for the sector, the tracked target begins to flash and the audible alarm is sounded
  • 45. 

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

    • Weather returns

    • Large target fluctuations only

    • Large target fluctuations and weather returns

    • Large target fluctuations and provide target enhancement

    Correct Answer
    A. Large target fluctuations and provide target enhancement
  • 46. 

    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)?

    • Mode control

    • Open loop

    • Closed loop

    • Rebound

    Correct Answer
    A. Rebound
  • 47. 

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

    • Filters out unwanted frequencies

    • Provides amplification of the transmitted pulse

    • Produces the second intermediate frequency

    • Prevents receiver damage by the transmitter high-power pulse

    Correct Answer
    A. Prevents receiver damage by the transmitter high-power pulse
  • 48. 

    In single cancellation, what happens to the pulse train after it is time-aligned with the next range scan?

    • The second range scan is added to the first

    • The signal bit is removed from the digital word

    • The second range scan is subtracted from the first

    • The magnitude information is extracted from the pulse train

    Correct Answer
    A. The second range scan is subtracted from the first
  • 49. 

    The output voltage adjustment for the AN/GPN–20 airport surveillance radar (ASR) high voltage power supply is located

    • On the high-voltage power supply rectifier circuit card

    • On the high-voltage power supply regulator circuit card

    • Behind the transmitter front panel control assembly

    • On the transmitter front panel

    Correct Answer
    A. On the transmitter front panel

Quiz Review Timeline (Updated): Mar 21, 2022 +

Our quizzes are rigorously reviewed, monitored and continuously updated by our expert board to maintain accuracy, relevance, and timeliness.

  • Current Version
  • Mar 21, 2022
    Quiz Edited by
    ProProfs Editorial Team
  • Jul 03, 2012
    Quiz Created by
    Huroku
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