2A672 Volume:2 Edit 6

38 Questions | Total Attempts: 1203

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2A672 Quizzes & Trivia

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Questions and Answers
  • 1. 
    DURING OPERATION OF THE EPU-6/E FREQUENCY CONVERTER IT IS DETERMIND 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. 
    What component receive potential directly from the input auto tranformer?
    • A. 

      Analog board and alarm display

    • B. 

      Control transformer and voltage control

    • C. 

      Input circut breaker and display power

    • D. 

      SCR voltage regulator and plase sequence transformer

  • 3. 
    What component of the EPU-6/E frequency converter must be inspected prior to use?
    • A. 

      Air inlet for blockage

    • B. 

      Wiring for secure mounting

    • C. 

      Maintenance panels for corrosion

    • D. 

      Interior air vents for sercure mounting

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

      Daily

    • B. 

      Annually

    • C. 

      Prior to use

    • D. 

      Semiannually

  • 5. 
    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. 
    During operation of the EPU-6/E frequency converter the operator determines that one phase voltage is lower than the other two phase. What could cause this malfunction?
    • A. 

      Malfunctions transistor

    • B. 

      Improper SCR firing adjustment

    • C. 

      Burnt control transformer fuse

    • D. 

      Loose push-on connector on the ourput filter capacitor

  • 7. 
    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. 
    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 duct

    • B. 

      Interstage seal

    • C. 

      Impeller

    • D. 

      Inducers

  • 9. 
    What A/M32A-95 gas turbine compressor engine component accelerated hot ecpanding gases and directs them into the nozzle ring?
    • A. 

      Torus assembly

    • B. 

      Combuster can

    • C. 

      Combuster cap

    • D. 

      Plenum

  • 10. 
    What prevents engine operation on an A/M32A-95 gas turbine compressor if oil pressure is low?
    • A. 

      Fuel safty switch

    • B. 

      Oil pressure switch

    • C. 

      Oil filter bypass valve

    • D. 

      Oil pressure relief valve

  • 11. 
    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 line vent line

  • 12. 
    The accelerationr 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. 
    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&3

    • D. 

      1,3&4

  • 14. 
    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. 

      34 percent centrifugal speed switch

  • 15. 
    Refer to foldout 2. The A/M32A-95 runs up to 60 percent but the battery us 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 it contacts closed

    • D. 

      K3 de-energized and the contacts did not remain closed

  • 16. 
    Refer to foldout 2. During operation check of the 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. 
    Refer to foldout 2. What component on the A/M32A-95 gas turbine compressorenergizes SV4?
    • A. 

      Master switch

    • B. 

      Air load valve

    • C. 

      Air load switch

    • D. 

      Oil pressure switch

  • 18. 
    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 latch

    • D. 

      Ensure the turbine air inlet and exhaust outlets are free of obstruction

  • 19. 
    Which switch on the A/M32A-95 gas turbine compressor start the automatic starting cycle?
    • A. 

      Turbine start switch

    • B. 

      Air load switch

    • C. 

      Inhibit switch

    • D. 

      Master switch

  • 20. 
    Refer to foldout 2. The A/M32A-95 engine cranks but doesnt 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. 
    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 cotroller sends a signal to
    • A. 

      B7 which steps closed to metter refrigerant into the evaporator

    • B. 

      B7 which steps open to metter refrigerant into the evaporator

    • C. 

      The quench valve which opens the aid in cooling

    • D. 

      S1 and S2 which open the to aid in cooling

  • 22. 
    The temperature controller on the 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 og the refrigerant must be decreased to decrease the output air pressure

    • D. 

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

  • 23. 
    What component on an MA-3D air conditioner, increases the ambient air temperature approximately 60 degrees fahrenheit?
    • A. 

      Blower

    • B. 

      Compressor

    • C. 

      Evaporator

    • D. 

      Aftercooler

  • 24. 
    The heat sink on a MA-3D
    • A. 

      Circulates the ethylene glyco/water solution

    • B. 

      Cools the ethylene glyco/water solution

    • C. 

      Cools discharge air from the blower

    • D. 

      Cools ambient air

  • 25. 
    Your 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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