2A672 Vol 2 Pre-test

38 Questions | Total Attempts: 46

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Aircraft Quizzes & Trivia

Questions and Answers
  • 1. 
    1. (201) During operation of the EPU–6/E frequency converter it is determined that E and F pin voltage is not needed for the aircraft. The operator places the loop/bypass/28V to aircraft switch to what position?
    • A. 

      28V to aircraft.

    • B. 

      Neutral.

    • C. 

      Bypass.

    • D. 

      Loop.

  • 2. 
    (201) What components receive potential directly from the input auto transformer?    
    • A. 

      Analog board and alarm display.

    • B. 

      Control transformer and voltage control.

    • C. 

      Input circuit breakers and display power supply.

    • D. 

      SCR voltage regulator and phase sequence transformer.

  • 3. 
    (202) What components on the EPU–6/E frequency converter must be inspected prior to use?    
    • A. 

      Air inlets for blockage.

    • B. 

      Wiring for secure mounting.

    • C. 

      Maintenance panels for corrosion.

    • D. 

      Interior air vents for secure mounting.

  • 4. 
    1. 202) What is the minimum interval at which the input and output terminals of the EPU–6/E are inspected? 
    • A. 

      Daily

    • B. 

      Annually

    • C. 

      Prior to use

    • D. 

      Semiannually

  • 5. 
    1. (202) During operation of the EPU–6/E frequency converter the operator determines that there is an under voltage (UV) fault problem with the unit. What component could be malfunctioning? 
    • A. 

      The analog board has failed.

    • B. 

      The output trim potentiometer is centered.

    • C. 

      The voltage control board potentiometer is shorted.

    • D. 

      The audible alarm switch is in the silence position.

  • 6. 
    1. (202) During operation of the EPU–6/E frequency converter the operator determines that one phase voltage is lower than the other two phases. What could cause this malfunction?
    • A. 

      Malfunctioning transistor.

    • B. 

      Improper SCR firing adjustment.

    • C. 

      Burnt control transformer fuse.

    • D. 

      Loose push-on connector on the output filter capacitor.

  • 7. 
    (203) What is the function of the deswirl ring on an A/M32A–95 gas turbine compressor?    
    • A. 

      Accelerate air

    • B. 

      Decrease air velocity

    • C. 

      Increase air pressure

    • D. 

      Smooth turbulent air flow

  • 8. 
    (203) What component on an A/M32A–95 gas turbine compressor isolates the second stage air from the operation of the first stage compressor?
    • A. 

      Interstage ducts

    • B. 

      Interstage seals

    • C. 

      Impellers

    • D. 

      Inducers

  • 9. 
    (203) What A/M32A–95 gas turbine compressor engine component accelerates hot expanding gases and directs them into the nozzle ring?
    • A. 

      Torus assembly

    • B. 

      Combustor can

    • C. 

      Combustor cap

    • D. 

      Plenum

  • 10. 
    (204) What prevents engine operation of an A/M32A–95 gas turbine compressor if oil pressure is low? 
    • A. 

      Fuel safety switch

    • B. 

      Oil pressure switch

    • C. 

      Oil filter bypass switch

    • D. 

      Oil pressure relief valve

  • 11. 
    (204) What prevents overpressurization of the bearing cavity on an A/M32A–95 gas turbine compressor? 
    • A. 

      Oil jet

    • B. 

      Oil cooler

    • C. 

      Scavenge pump

    • D. 

      Oil tank vent line

  • 12. 
    (204) The acceleration limiter valve on the A/M32A–95 gas turbine compressor operates a poppet valve to control fuel flow to the atomizer using control air pressure combined with
    • A. 

      Oil Pressure

    • B. 

      Fuel pressure

    • C. 

      Spring tension

    • D. 

      Plenum air pressure

  • 13. 
    (204) On an A/M32A–95 gas turbine compressor what chambers are pressurized when the butterfly valve is closed?
    • A. 

      1&3

    • B. 

      2&4

    • C. 

      1,2, and 3

    • D. 

      1,3, and 4

  • 14. 
    (204) What component on the A/M32A–95 gas turbine compressor closes to complete the electrical circuit to the fuel solenoid and ignition unit?
    • A. 

      Load switch

    • B. 

      Oil pressure switch

    • C. 

      Turbine start switch

    • D. 

      35 percent centrifugal switch

  • 15. 
    (204) Refer to foldout 2. The A/M32A–95 runs up to 60 percent but the battery is not charging. What is the probable cause of this trouble?
    • A. 

      K4 energized and its contacts closed.

    • B. 

      K3 de-energized and its contacts opened.

    • C. 

      K4 de-energized and its contacts closed.

    • D. 

      K3 de-energized and the contacts did not remain closed.

  • 16. 
    (204) Refer to foldout 2. During an operational check of an A/M32A–95 gas turbine compressor, you place the air load switch S2 in the ON position. The butterfly valve starts to open at 95 percent. What do you check?
    • A. 

      SV2

    • B. 

      S10

    • C. 

      TD2

    • D. 

      K6

  • 17. 
    (204) Refer to foldout 2. What component on an A/M32A–95 gas turbine compressor energizes SV4? 
    • A. 

      Master switch

    • B. 

      Air load valve

    • C. 

      Air load switch

    • D. 

      Oil pressure switch

  • 18. 
    (205) What preliminary set-up step, if skipped, would prevent the A/M32A–95 gas turbine compressor from starting?
    • A. 

      Set-up controls

    • B. 

      Set parking brake

    • C. 

      Open and secure the exhaust door

    • D. 

      Ensure the turbine air inlet and exhaust outlet are free of combustion

  • 19. 
    (205) Which switch on the A/M32A–95 gas turbine compressor starts the automatic starting cycle? 
    • A. 

      Turbine start switch

    • B. 

      Air Load switch

    • C. 

      Inhibit switch

    • D. 

      Master switch

  • 20. 
    (205) Refer to foldout 2. The A/M32A–95 engine cranks but doesn’t start. What is the probable cause of this trouble?
    • A. 

      CB3 is open

    • B. 

      S9 is shorted

    • C. 

      SV1 coil is open

    • D. 

      K7 is not energizing

  • 21. 
    (206) While you are operating an MA–3D air conditioner, the output air temperature is too high, so you set the temperature control to maximum cooling. The temperature controller sends a signal to 
    • A. 

      B7 which steps closed to meter refrigerant into the evaporator.

    • B. 

      B7 which steps open to meter refrigerant into the evaporator.

    • C. 

      The quench valve which opens to aid in cooling.

    • D. 

      S1 and S2 which open to aid in cooling.

  • 22. 
    (206) The temperature controller on an MA–3D air conditioner opens the hot gas bypass valve if the 
    • A. 

      Suction air pressure is too high so the boiling point of the refrigerant can be decreased.

    • B. 

      Air pressure is too low so the boiling point of the R134a must be increased.

    • C. 

      Suction pressure is too high so the boiling point of the refrigerant must be decreased to decrease the output air temperature.

    • D. 

      Suction pressure is too low so the boiling point of the refrigerant must be increased to increase the output air temperature.

  • 23. 
    (206) What component on an MA–3D air conditioner increases the ambient air temperature approximately 60 degrees Fahrenheit (°F)?
    • A. 

      Blower

    • B. 

      Compressor

    • C. 

      Evaporator

    • D. 

      Aftercooler

  • 24. 
    (206) The heat sink on the MA–3D
    • A. 

      Circulates the ethylene glycol/water solution.

    • B. 

      Cools the ethylene glycol/water solution.

    • C. 

      Cools discharge air from the blower.

    • D. 

      Cools ambient air.

  • 25. 
    (207) You place the MA–3D air conditioner SW1 in the START position, but the engine does not operate. What is the probable cause of this trouble?
    • A. 

      K7 contacts are closed.

    • B. 

      Overspeed switch is closed.

    • C. 

      Override switch is not closed.

    • D. 

      Oil pressure switch is closed.

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