2a353 Vol 3 (In Work)

59 Questions | Total Attempts: 40

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Work Quizzes & Trivia

This is a study guide for Vol 3


Questions and Answers
  • 1. 
    What two conditions cause the EPU to automatically operate?
    • A. 

      EPU switch to ON & battery switch to EMERG

    • B. 

      Loss of engine generator & low battery charge

    • C. 

      Loss of system-A & system-B hydraulic power

    • D. 

      Failure of the main/standby generators & loss of system-A and system-B hydraulic power

  • 2. 
    What hydraulic system does the EPU hydraulic pump provide pressure to?
    • A. 

      Hydraulic System-A only

    • B. 

      Hydraulic System-A & System-B

    • C. 

      Hydraulic System-B only

    • D. 

      Utility Hydraulic System

  • 3. 
    Which EPU operational mode is intended to be a ground functional test only and is not utilized for in-flight emergencies?
    • A. 

      Normal

    • B. 

      Bleed air

    • C. 

      EPU/GEN

    • D. 

      Augment

  • 4. 
    What is the main electrical component of the EPU system?
    • A. 

      EPU Speed controller

    • B. 

      EPU nitrogen valve

    • C. 

      EPU emergency hydraulic pump

    • D. 

      EPU hydrazine fuel

  • 5. 
    How many pounds does the Hydrazine tank hold?
    • A. 

      36 lbs

    • B. 

      46 lbs

    • C. 

      56 lbs

    • D. 

      66 lbs

  • 6. 
    What does the EPU FIRED indicator display once the EPU is fired?
    • A. 

      A "red" button indicator

    • B. 

      Six equally spaced silver and black triangles

    • C. 

      Six equally spaced gray and black triangles

    • D. 

      The word "FIRED" appears in the window

  • 7. 
    What position of the EPU mode switch arms the EPU system and makes it ready for automatic operation should the need arise?
    • A. 

      NORM

    • B. 

      Bleed Air

    • C. 

      EPU/GEN

    • D. 

      Augment

  • 8. 
    What does an amber AIR light on the EPU control panel indicate?
    • A. 

      Bleed air is being commanded by the electrponic speed controller to power the EPU

    • B. 

      The nitrogen valve has opened and is bled pressure into the Hydrazine tank

    • C. 

      The decomposition chamber has reached 1,200F

    • D. 

      A failure of the bleed air speed control and shutoff valve

  • 9. 
    What is a Dewar flask?
    • A. 

      Another name for the LOX converter

    • B. 

      The smallest part of the LOX converter

    • C. 

      A double-walled container in the LOX converter that has air evacuated from the space between the walls

    • D. 

      The junction between the LOX converter and the regulator

  • 10. 
    What would cause frost to form on the LOX warm-up coil?
    • A. 

      A leak in the Dewar flask

    • B. 

      A leak in the LOX system

    • C. 

      Failure of the LOX relief valve

    • D. 

      Failure of the oxygen heat exchanger

  • 11. 
    What LOX system component has a spring-loaded check valve that prevents reverse flow of liquid oxygen from the container when you are servicing the converter?
    • A. 

      Oxygen relief valve

    • B. 

      Oxygen fill valve

    • C. 

      Oxygen regulator

    • D. 

      Oxygen distribution manifold

  • 12. 
    Where is the emergency oxygen bottle located?
    • A. 

      Left side of the ejection seat

    • B. 

      Right side of the ejection seat

    • C. 

      Attached to the right control panel

    • D. 

      Attached to the left control panel

  • 13. 
    What provides a path from the LOX indicating probes to the quantity indicator?
    • A. 

      Quantity test relay

    • B. 

      Probes

    • C. 

      Coaxial cables

    • D. 

      Test switch

  • 14. 
    Where is the oxygen low-pressure switch located?
    • A. 

      In the forward right console crew comparment matrix assembly

    • B. 

      In the vacuum space of the converter's Dewar flask

    • C. 

      On the oxygen system TEST panel

    • D. 

      Connected to the gaseous oxygen supply tube between the forward OXY FLOW indicator and the forward oxygen regulator

  • 15. 
    At what quantity level does the OXY LOW warning light illuminate?
    • A. 

      Less than 0.1 liters

    • B. 

      Less than 0.3 liters

    • C. 

      Less than 0.5 liters

    • D. 

      Less than 0.9 liters

  • 16. 
    What happens when you close the oxygen quantity test switch?
    • A. 

      The indicator drives towards the empty end of the dial

    • B. 

      The indicator rotates CCW

    • C. 

      The indicator rotates clockwise

    • D. 

      The indicator falls to zero and stops

  • 17. 
    What would cause the LOX quantity indicator to rotate counter-clockwise?
    • A. 

      Pressing the oxygen test switch

    • B. 

      Loss of electrical power

    • C. 

      A shorted probe (plate to plate)

    • D. 

      A short-to-ground in the high voltage side of the circuit

  • 18. 
    What causes clockwise rotation of the indicator?
    • A. 

      Pressing the oxygen test switch

    • B. 

      Loss of electrical power

    • C. 

      A shorted probe (plate to plate)

    • D. 

      A short-to-ground in the high voltage side of the circuit

  • 19. 
    Where are the overheat sensing elements located?
    • A. 

      Throughout the engine bay and engine nacelles

    • B. 

      Throughout the engine bay, engine nacelles, ECS bay, EPU bay and bleed air ducts

    • C. 

      Throughout the engine nacelles, ECS bay, EPU bay and the bleed air ducts

    • D. 

      Throughout the engine bay and bleed air ducts

  • 20. 
    How are the fire detection set sensing elements grounded?
    • A. 

      Each element grounds to the Fire Detection Unit

    • B. 

      Each element grounds to the aircarft frame by the element connectors

    • C. 

      Each element grounds to the airframe be electrical terminal ends

    • D. 

      Each element grounds to aircraft structural ribs and stringers

  • 21. 
    What is the alarm temperature of the fire detection set sensing elements?
    • A. 

      765 degrees F

    • B. 

      755 degrees F

    • C. 

      745 degrees F

    • D. 

      775 degrees F

  • 22. 
    How long can the fire detection set cable assembly withstand a temperature of 2000 degrees F?
    • A. 

      1 minute

    • B. 

      5 minutes

    • C. 

      10 minutes

    • D. 

      15 minuntes

  • 23. 
    How do you test the integrity of the sensing elements?
    • A. 

      Using the T-handle push-to-test switch

    • B. 

      Using the Master Caution push-to-test switch

    • C. 

      Using the fire detection test set

    • D. 

      Using the fire detection test switch

  • 24. 
    How many loops of the control unit circuitry must detect a fire or overheat condition before a warning light illuminates in the cockpit?
    • A. 

      Only one loop of the control unit circuitry is required to detect a fire/overheat condition

    • B. 

      Both loops of the control unit circuitry must detect a fire/overheat condition

    • C. 

      Only one loop must sense an overheat condition above 575 degrees F

    • D. 

      Only one loop must sense an overheat condition above 765 degrees F

  • 25. 
    How much Halon does the fuel interting system reservoir hold?
    • A. 

      11 pounds

    • B. 

      13 pounds

    • C. 

      15 pounds

    • D. 

      17 pounds

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