C-130h APU (Auxiliary Power Unit) Quiz

30 Questions | Total Attempts: 1130

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  • 1. 
    You must first _________before applying bleed air?
    • A. 

      Turn on the AC inverter

    • B. 

      Clear the A/C packs

    • C. 

      Clear the propellers

    • D. 

      Inspect the engine intake and exhaust

  • 2. 
    The cool down time after removing a load from the APU is _____ minutes.
    • A. 

      1

    • B. 

      4

    • C. 

      2

    • D. 

      3

  • 3. 
    The Job Guide for APU operation is:
    • A. 

      1C-130H-2-70JG-00-1

    • B. 

      1C-130E-2-49JG-00-1

    • C. 

      1C-130H-2-05JG-00-1

    • D. 

      1C-130H-2-49JG-00-1

  • 4. 
    The APU starter duty cycle is:
    • A. 

      1 minute on, 2 minutes off

    • B. 

      2 minutes on, 1 minute off

    • C. 

      1 minute on, 4 minutes off

    • D. 

      I minute on, 1 minute off

  • 5. 
    What is the first thing that is done before running the APU?
    • A. 

      Clear the props

    • B. 

      Clear the APU

    • C. 

      Check the aircraft forms

    • D. 

      Service the APU oil

  • 6. 
    The APU oil tank is located _________.
    • A. 

      In the cargo compartment

    • B. 

      In the left wheel well

    • C. 

      Aft of the APU in the left wheel well forward fairing

    • D. 

      Underneath the APU

  • 7. 
    What is the frequency range of the APU generator?
    • A. 

      300-400 Hz

    • B. 

      380-420 Hz

    • C. 

      112-118 Hz

    • D. 

      120-240 Hz

  • 8. 
    The APU oil tank and system oil quantity is ___ US quarts.
    • A. 

      4

    • B. 

      5

    • C. 

      7

    • D. 

      6

  • 9. 
    Which radio is used for communication to the tower and for emergency calls?
    • A. 

      VHF

    • B. 

      UHF

    • C. 

      HF

    • D. 

      SCNS

  • 10. 
    Where is the APU fuel strainer located?
    • A. 

      In the number 2 dry bay

    • B. 

      Underneath the right forward wheel well fairing

    • C. 

      Underneath the APU compartment

    • D. 

      On the bottom of the left wheel well fairing at the inboard aft corner of the APU compartment

  • 11. 
    Which bus supplies power to the APU control circuit?
    • A. 

      Main DC

    • B. 

      Essential AC

    • C. 

      Isolated DC

    • D. 

      Essential DC

  • 12. 
    The APU receives its fuel from __________________.
    • A. 

      Crossfeed manifold

    • B. 

      #3 main tank

    • C. 

      #2 main tank

    • D. 

      Refuel manifold

  • 13. 
    The APU system includes:
    • A. 

      APU door, APU, ATM, APU fuel supply, exhaust and oil subsytems

    • B. 

      APU, APU door, APU fuel supply/ignition/starting, the bleed air and APU indicating

    • C. 

      The APU door, APU, APU fuel supply/ignition/staring, the bleed air, APU control, APU exhaust and oil supply subsystems

    • D. 

      The APU, APU control, APU indicating, the ATM, exhaust and oil supply

  • 14. 
    You must shut down the APU if the START light does not go out within ___________.
    • A. 

      2 minutes

    • B. 

      1 minute

    • C. 

      30 seconds

    • D. 

      1.5 minutes

  • 15. 
    The APU supplies what?
    • A. 

      Electrical power and bleed air for starting engines

    • B. 

      Bleed air for starting engines and operating other bleed air systems

    • C. 

      Electrical power

    • D. 

      Hydraulic power

  • 16. 
    What is the voltage range of the APU generator?
    • A. 

      110-120v

    • B. 

      120-240v

    • C. 

      110-118v

    • D. 

      112-118v

  • 17. 
    The purpose of draining the fuel strainer is to ensure that:
    • A. 

      There is fuel in the system

    • B. 

      The fuel shutoff valve is open

    • C. 

      The fuel shutoff valve is closed

    • D. 

      There is no dirt in the system

  • 18. 
    The APU bleed air check from 30 to 15 psi should be no less than ____________.
    • A. 

      8.5 seconds

    • B. 

      20 seconds

    • C. 

      16 seconds

    • D. 

      18 seconds

  • 19. 
    If an overspeed condition exists, what shuts down the APU?
    • A. 

      95% switch

    • B. 

      The three speed switch

    • C. 

      110% switch

    • D. 

      Centrifugal switch

  • 20. 
    Under normal conditions,the APU must warm up ___ minutes before applying a load.
    • A. 

      1

    • B. 

      2

    • C. 

      3

    • D. 

      4

  • 21. 
    Where is the APU located?
    • A. 

      In the left wheel well

    • B. 

      Underneath the pilot and copilot

    • C. 

      In the forward left wheel well fairing

    • D. 

      Forward of the left wheel well fairing

  • 22. 
    How many quarts does the APU oil tank hold?
    • A. 

      3

    • B. 

      4

    • C. 

      5

    • D. 

      6

  • 23. 
    The minimum battery voltage for operating the APU is _____.
    • A. 

      28v

    • B. 

      24v

    • C. 

      21v

    • D. 

      12v

  • 24. 
    What happens at 95% RPM?
    • A. 

      The 95% switch shuts down the APU

    • B. 

      The ON SPEED light goes out

    • C. 

      The START light goes out

    • D. 

      The ON SPEED light comes on

  • 25. 
    A FIRE condition in the APU is identified by:
    • A. 

      A steady light in the APU handle and a flashing MASTER CAUTION light

    • B. 

      A flashing light in the APU handle and a flashing MASTER CAUTION light

    • C. 

      A flashing light in the APU handle and a steady FIRE light

    • D. 

      A steady light in the APU handle and a steady FIRE light