737 Air Systems (600/700/800)

31 Questions | Total Attempts: 495

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737 Air Systems (600/700/800)

737-6/7/800 Study Guide


Questions and Answers
  • 1. 
    The blue RAM DOOR FULL OPEN Light illuminates whenever:
    • A. 

      The airplane is in flight with the landing gear extended.

    • B. 

      The airplane is on the ground.

    • C. 

      Anytime the airplane is in flight.

    • D. 

      When the Ram Door is fully open.

    • E. 

      Both b and d are correct.

  • 2. 
    What fault indications can be reset with the TRIP RESET Switch?
    • A. 

      BLEED TRIP OFF.

    • B. 

      PACK

    • C. 

      ZONE TEMP.

    • D. 

      All of the above.

  • 3. 
    Two pressure relief valves provide safety pressure relief by limiting the differential pressure to a maximum of:
    • A. 

      7.80 psi.

    • B. 

      9.10 psi.

    • C. 

      8.35 psi.

    • D. 

      7.45 psi.

  • 4. 
    The motorized Overboard Exhaust valve:
    • A. 

      Allows for increased ventilation in the smoke removal configuration.

    • B. 

      Serves as backup to the outflow valve if the outflow valve fails.

    • C. 

      Is normally open during pressurized flight above 8000 feet.

    • D. 

      All the above.

  • 5. 
    The amber DUAL BLEED Light indicates a possible APU back pressure condition and thrust must be limited to IDLE.
    • A. 

      True

    • B. 

      False

  • 6. 
    Refer to the Cabin/Flight Altitude placard. At a cruise altitude of FL 290, the cabin altitude in the manual mode should read:
    • A. 

      Approximately 8000 feet.

    • B. 

      Slightly less than FL 220.

    • C. 

      Approximately 6000 feet.

    • D. 

      Cannot be determined by this placard.

  • 7. 
    The amber OFF SCHEDULE DESCENT Light illuminates. What does this indicate?
    • A. 

      The pressure controller is unable to maintain pressurization.

    • B. 

      The airplane has descended before reaching the preset cruise altitude set in the FLT ALT indicator.

    • C. 

      The pressurization controller has failed and will automatically shift to ALT mode.

    • D. 

      All of the above.

  • 8. 
    Following an unpressurized takeoff, when is the first engine Bleed Switch positioned to ON?
    • A. 

      Prior to 400 feet above the ground.

    • B. 

      After passing through 2000 feet above the ground

    • C. 

      At not less than 400 feet, and prior to 2000 first above field elevation.

    • D. 

      After the No. 1 engine bleed switch is positioned to ON.

  • 9. 
    What is the main source of conditioned air for the flight deck?
    • A. 

      The Right Pack.

    • B. 

      The Left Pack.

    • C. 

      Both packs.

    • D. 

      Ground Air Cart.

  • 10. 
    What systems rely on the pneumatic system for operation?
    • A. 

      Air conditioning/Pressurization, Wing anti-ice, Fuel tanks

    • B. 

      Wing Anti-ice, APU, engine starting.

    • C. 

      APU, engine starting, Air conditioning/Pressurization.

    • D. 

      Engine starting, Air conditioning/Pressurization, Wing and engine thermal anti-ice, Hydraulic reservoirs and water tank pressurization.

  • 11. 
    Illumination of the amber BLEED TRIP OFF Light indicates what valve has automatically closed?
    • A. 

      Modulating and Shutoff valve.

    • B. 

      Related Engine Bleed Air valve.

    • C. 

      Isolation valve.

    • D. 

      All of the above are correct.

  • 12. 
    What happens to engine fan air that is used to cool engine bleed air?
    • A. 

      It is ducted into the pneumatic manifold.

    • B. 

      It is ducted into the crossbleed manifold.

    • C. 

      It is discharged overboard.

    • D. 

      It is ducted into the 5th stage compressor.

  • 13. 
    When does the amber DUAL BLEED Illuminate?
    • A. 

      When the APU bleed valve is open and the No.1 engine bleed valve is closed.

    • B. 

      When the APU bleed valve is open and the No.1 engine bleed switch is ON.

    • C. 

      When the APU bleed valve is open, the No. 2 engine bleed switch is on and the isolation valve is open.

    • D. 

      Both b and c are correct.

  • 14. 
    What is the position of the isolation valve when the ISOLATION VALVE Switch is in AUTO?
    • A. 

      The isolation valve is always open.

    • B. 

      The isolation valve is always closed.

    • C. 

      The isolation valve automatically modulates between open and closed, depending on pneumatic load.

    • D. 

      Open when any Engine Bleed Air Switch or Air Conditioning Pack Switch is positioned OFF.

  • 15. 
    What happens when the WING-BODY OVHT TEST switch is pressed?
    • A. 

      The amber WING-BODY OVHT lights illuminate.

    • B. 

      The amber PACK TRIP OFF lights illuminate.

    • C. 

      The amber BLEED TRIP OFF lights illuminate.

    • D. 

      All of the above are correct.

  • 16. 
    How are the Engine Bleed Air valves powered?
    • A. 

      They are AC activated and pneumatically operated.

    • B. 

      They are DC activated and pneumatically operated

    • C. 

      They are pressure activated and AC operated.

    • D. 

      They are pressure activated and DC operated.

  • 17. 
    An illuminated BLEED TRIP OFF light indicates excessive engine bleed air pressure or temperature.
    • A. 

      True

    • B. 

      False

  • 18. 
    TRIM AIR is added to air from the mix manifold to:
    • A. 

      Reduce pack demand.

    • B. 

      Help maintain a constant cabin pressure.

    • C. 

      Control zone temperature.

    • D. 

      Control pack temperature.

  • 19. 
    Failure of the primary flight deck temperature control will cause an automatic switch to the back-up control.
    • A. 

      True

    • B. 

      False

  • 20. 
    A zone supply duct overheat will result in:
    • A. 

      The closing of the associated Trim Air Modulating Valve.

    • B. 

      The illumination of the associated amber ZONE TEMP Light.

    • C. 

      Both the closing of the associated Trim Air Modulating Valve and the illumination of the associated ZONE TEMP Light.

    • D. 

      The opening of the associated Trim Air Modulating Valve after the TRIP RESET Switch is pushed.

  • 21. 
    If any individual zone is switched OFF, the Temperature Selector setting will be ignored by the temperature control system.
    • A. 

      True

    • B. 

      False

  • 22. 
    If all pack control is lost, that pack will automatically shut down.
    • A. 

      True

    • B. 

      False

  • 23. 
    The Recirculation Fans:
    • A. 

      Are driven by DC motors.

    • B. 

      Increase airflow at greater cabin differential pressures.

    • C. 

      Reduce air conditioning pack load.

    • D. 

      Provide overheat detection downstream of the packs.

  • 24. 
    What causes an amber PACK Light to illuminate?
    • A. 

      A pack trip off.

    • B. 

      Failure of both primary and standby pack control for the same pack.

    • C. 

      Turning OFF an engine bleed switch.

    • D. 

      Both a and b are correct.

  • 25. 
    The bleed air duct pressure indicator:
    • A. 

      Cannot indicate external air pressure

    • B. 

      Indicates both temperature and pressure in the bleed air duct

    • C. 

      Shows duct pressure in both the left and right bleed air ducts

    • D. 

      Requires DC power for operation

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