APU Emergency Shutdown Procedures

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| By Ewilds
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  • 1/13 Questions

    9. Place EXT ___ PWR switch to OFF.

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About This Quiz

This is a familiarization of the APU emergency shutdown procedures.

Aerospace Quizzes & Trivia

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  • 2. 

    What is the first step in an emergency shutdown?

    • Place AGENT DISCHARGE/AGENT DISCH switch to NO. 1 and release.

    • Notify all personnel to evacuate airplane.

    • Pull APU fire control handle.

    • Run to the smoke pit.

    Correct Answer
    A. Pull APU fire control handle.
    Explanation
    The first step in an emergency shutdown is to pull the APU fire control handle. This action is crucial in order to stop any potential fire or hazard caused by the APU (Auxiliary Power Unit). By pulling the APU fire control handle, the power supply to the APU is cut off, preventing any further damage or risk. This step should be taken immediately to ensure the safety of the aircraft and its occupants.

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  • 3. 

    What can happen if the AGENT DISCHARGE/AGENT DISCH is held for too long?

    • It may cause fire to become uncontrollable.

    • System will work as intended.

    • It may cause the synchrophaser circuit breaker to trip and the synchrophaser system to become inoperative.

    • It may cause the fire extinguisher circuit breaker to trip and the fire extinguisher system to become inoperative.

    Correct Answer
    A. It may cause the fire extinguisher circuit breaker to trip and the fire extinguisher system to become inoperative.
    Explanation
    If the AGENT DISCHARGE/AGENT DISCH is held for too long, it may cause the fire extinguisher circuit breaker to trip and the fire extinguisher system to become inoperative. This means that the system designed to extinguish the fire will no longer be able to function, potentially allowing the fire to continue spreading and becoming uncontrollable.

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  • 4. 

    10. Place EXT ___ PWR switch to OFF.

    Correct Answer
    DC
    Explanation
    The correct answer is DC because in this context, "EXT" most likely refers to an external power source, and "PWR" stands for power. Therefore, "Place EXT ___ PWR switch to OFF" means to turn off the external power source.

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  • 5. 

    Hold the AGENT DISCHARGE/AGENT DISCH switch to NO. 1for at least five seconds.

    • True

    • False

    Correct Answer
    A. False
    Explanation
    Do not hold the AGENT DISCHARGE/
    AGENT DISCH switch to NO. 1 or NO. 2
    for more than two seconds.

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  • 6. 

    The job guide states that this procedure requires 3 personnel - Mech A, B and C.

    • True

    • False

    Correct Answer
    A. False
    Explanation
    It only requires Mech A and B.

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  • 7. 

    Which step instructs to request fire department assistance?

    • Step 3

    • Step 2

    • Step 7

    • Step 10

    Correct Answer
    A. Step 3
    Explanation
    Step 3 instructs to request fire department assistance. This implies that this step contains the necessary information or action to be taken in order to contact the fire department for help.

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  • 8. 

    At what step would you place the BLEED AIR VALVE/BL AIR switch toCLOSE/OFF.

    • Step 2

    • Step 7

    • Step 11

    • Step 5

    Correct Answer
    A. Step 7
    Explanation
    The correct answer is Step 7 because this is the step where the BLEED AIR VALVE/BL AIR switch should be placed to CLOSE/OFF. Placing the switch in this position will shut off the flow of bleed air, which is necessary in certain situations such as during engine start or in the event of a bleed air leak.

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  • 9. 

    Step 5 states to:

    • Notify all personnel to evacuate airplane.

    • Monitor fire area and stand by with fire extinguisher until assistance arrives.

    • Request fire department assistance.

    • Place the APU CONTROL/APU switch to STOP.

    Correct Answer
    A. Monitor fire area and stand by with fire extinguisher until assistance arrives.
    Explanation
    The correct answer is to monitor the fire area and stand by with a fire extinguisher until assistance arrives. This step is important to ensure the safety of personnel and to prevent the fire from spreading or causing further damage. By monitoring the fire area, one can assess the situation and take necessary actions if needed. Standing by with a fire extinguisher allows for immediate response in case the fire worsens or poses a threat. Waiting for assistance to arrive ensures that trained professionals can handle the situation effectively and safely.

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  • 10. 

    Step 8 states:

    • Place the APU GENERATOR/APU switch to the OFF or OFF/RESET position.

    • Place EXT DC PWR switch to OFF.

    • Notify all personnel to evacuate airplane.

    • Request fire department assistance.

    Correct Answer
    A. Place the APU GENERATOR/APU switch to the OFF or OFF/RESET position.
    Explanation
    In step 8, the correct answer is to place the APU GENERATOR/APU switch to the OFF or OFF/RESET position. This action is necessary in an emergency situation to shut off the APU generator and prevent any potential electrical hazards. By turning off the APU generator, the risk of fire or further damage can be minimized.

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  • 11. 

    At what point does the job guide instruct to have all personnel evacuate airplane and area immediately, if fire becomes severe?

    • Step 5

    • CAUTION

    • WARNING

    • Step 1

    Correct Answer
    A. WARNING
    Explanation
    The correct answer is "WARNING" because in emergency situations, a warning is given to indicate that the fire has become severe and immediate evacuation of all personnel from the airplane and the surrounding area is necessary for their safety. The warning serves as a clear signal to take immediate action and prioritize the safety of individuals.

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  • 12. 

    What work package is the emergency shutdown procedures located?

    • 49-00-1

    • 49-00-2

    • 49-00-3

    • 49-00-10

    Correct Answer
    A. 49-00-3
  • 13. 

    8. Place the _________________ switch to the___ or _________ position.

    • APU CONTROL/APU switch

    • APU GENERATOR/APU switch

    • OFF

    • STOP

    • OFF/RESET

    • CLOSE/OFF

    Correct Answer(s)
    A. APU GENERATOR/APU switch
    A. OFF
    A. OFF/RESET
    Explanation
    The correct answer is to place the APU GENERATOR/APU switch to the OFF position and the OFF/RESET position. This means that the switch controlling the APU generator should be turned off, and the switch should also be in the off or reset position.

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

  • Current Version
  • Mar 20, 2023
    Quiz Edited by
    ProProfs Editorial Team
  • Dec 04, 2010
    Quiz Created by
    Ewilds
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