2A656 Vol 4 Ure (2013)

85 Questions | Total Attempts: 624

SettingsSettingsSettings
2A656 Vol 4 Ure (2013)


Questions and Answers
  • 1. 
    (601) All of these aircraft systems use engine bleed air except
    • A. 

      Anti-gravity (anti-G).

    • B. 

      Fire extinguishing.

    • C. 

      Rain removal.

    • D. 

      Anti-icing.

  • 2. 
    (601) Bleed air is usually taken from this aircraft engine section.
    • A. 

      Intake.

    • B. 

      Turbine.

    • C. 

      Exhaust.

    • D. 

      Compressor.

  • 3. 
    (601) What is the approximate pressure and maximum temperature of engine bleed air as it is tapped from the engine compression section?
    • A. 

      100 pounds per square inch (psi) and 700 degrees Fahrenheit (°F).

    • B. 

      150 psi and 750°F.

    • C. 

      200 psi and 900°F.

    • D. 

      250 psi and 950°F.

  • 4. 
    (601) Which component determines the amount of bleed air bled from a gas turbine compressor (GTC)?
    • A. 

      Thermocouple.

    • B. 

      Fuel control valve.

    • C. 

      Load control valve.

    • D. 

      Bleed air control governor.

  • 5. 
    (601) Engine bleed air check valves are installed to
    • A. 

      Reduce bleed air pressure when the pressure is too high.

    • B. 

      Maintain a balanced airflow from each engine.

    • C. 

      Prevent the loss of compressed bleed air.

    • D. 

      Provide a primary source for bleed air.

  • 6. 
    (601) What engine bleed air valve prevents air from being lost through the engine when it is shutdown?
    • A. 

      Check.

    • B. 

      Shutoff.

    • C. 

      Isolation.

    • D. 

      Crossover.

  • 7. 
    Pressure limiter.
    • A. 

      Pressure limiter.

    • B. 

      Flow control valve.

    • C. 

      Air regulator valve.

    • D. 

      System shutoff valve.

  • 8. 
    (602) If electrical power is interrupted to the solenoid of an electrically controlled, pneumatically operated air-conditioning system shutoff valve with a fail-safe feature, the valve
    • A. 

      Opens.

    • B. 

      Closes.

    • C. 

      Opens, if closed; closes, if opened.

    • D. 

      Opens or closes depending on system design requirements.

  • 9. 
    (602) What pressure and flow control device restricts airflow and protects aircraft engines against air starvation?
    • A. 

      Orifice.

    • B. 

      Air regulator.

    • C. 

      Pressure limiter.

    • D. 

      Pressure regulator.

  • 10. 
    (602) Due to a loss of energy, the outlet air pressure of an orifice is
    • A. 

      Lower than the inlet.

    • B. 

      Higher than the inlet.

    • C. 

      Lower than the throat.

    • D. 

      The same as the throat.

  • 11. 
    (602) What is the bleed air system component that controls the airflow by protecting downstream components from excessive pressure?
    • A. 

      Orifice.

    • B. 

      Pressure limiter.

    • C. 

      Pressure regulator.

    • D. 

      Flow control valve.

  • 12. 
    (602) The amount of airflow through a pressure limiter is affected by each of these except
    • A. 

      Inlet pressure.

    • B. 

      Outlet pressure.

    • C. 

      Inlet temperature.

    • D. 

      Differential pressure.

  • 13. 
    (602) The butterfly valve of the air-conditioning pressure limiter is open when
    • A. 

      The upper limiter is compressed.

    • B. 

      There is not enough pressure applied to the system.

    • C. 

      A force is applied downward on the actuator diaphragm.

    • D. 

      The downstream pressure port receives 70 pounds per minute (ppm) airflow.

  • 14. 
    (602) The flow control valve control in the bleed air air-conditioning system controls flow by maintaining a constant differential pressure between the
    • A. 

      Inlet and throat of the venturi.

    • B. 

      Outlet and inlet of the venturi.

    • C. 

      Outlet and throat of the venturi.

    • D. 

      Inlet, outlet, and throat of the venturi.

  • 15. 
    (602) Which bleed air system component is installed upstream of the flow control valve to control the valve’s inlet pressure?
    • A. 

      Metering valve.

    • B. 

      Pressure limiter.

    • C. 

      System shutoff valve.

    • D. 

      Air pressure regulator and shutoff valve.

  • 16. 
    (602) If the source pressure drops below the bleed air pressure regulator setting,
    • A. 

      The flow control valve closes.

    • B. 

      The pressure regulator closes.

    • C. 

      All available air pressure is supplied to the flow control valve.

    • D. 

      The air-conditioning system goes into a low-flow mode of operation.

  • 17. 
    (602) Which bleed air system component modulates to maintain a constant downstream air pressure?
    • A. 

      Pressure limiter.

    • B. 

      Airflow regulator.

    • C. 

      Pressure regulator.

    • D. 

      Flow control valve.

  • 18. 
    (602) After replacing a bleed air system air-conditioning airflow regulator fusible plug, you must also reset the
    • A. 

      Lockout butterfly.

    • B. 

      Pneumatic switch.

    • C. 

      Pneumatic thermostat.

    • D. 

      Breakaway plug assembly.

  • 19. 
    (602) The downstream air temperature of the bleed air air-conditioning system has exceeded the predetermined temperature and has caused the butterfly to close. What flow control and shutoff switch now opens?
    • A. 

      Fusible.

    • B. 

      Thermal.

    • C. 

      Pneumatic.

    • D. 

      Breakaway.

  • 20. 
    (603) Aircraft high-pressure/high-temperature air-conditioning ducting is usually made of this type material.
    • A. 

      Titanium.

    • B. 

      Aluminum.

    • C. 

      Stainless steel.

    • D. 

      Aluminum/nickel alloy.

  • 21. 
    603) What tool do you use to install a high-pressure/high-temperature V-band clamp to ensure it is aligned and sealed properly?
    • A. 

      Screwdriver.

    • B. 

      Center punch.

    • C. 

      Rawhide mallet.

    • D. 

      Ball peen hammer.

  • 22. 
    603) While installing a bleed air system bolted flanged duct end, use a metal or fiber gasket, align the flange, and insert the bottom bolts first to form a cradle. Then, you install the remaining bolts and tighten all the nuts. After the installation is complete, you perform an operational check that reveals a leak. From the above information, what important procedure was overlooked?
    • A. 

      Sealant compound was not used with the gaskets.

    • B. 

      Flange bolts were not torqued in the proper sequence.

    • C. 

      Flange was not tapped with a rawhide mallet while torquing.

    • D. 

      Gasket should have been installed before cradle bolts were installed.

  • 23. 
    (603) A crush-type gasket used in the bolted flange aircraft-ducting end is made of
    • A. 

      Fiber and fiberglass.

    • B. 

      Fiberglass and neoprene or rubber.

    • C. 

      Soft aluminum or fiber and metal mesh.

    • D. 

      Soft aluminum and fiber reinforced rubber or plastic.

  • 24. 
    (603) What important fact must you remember, that can be overlooked, when replacing gaskets used in aircraft ducting?
    • A. 

      Only replace gaskets if they are distorted.

    • B. 

      Always install a new gasket each time a joint is reconnected

    • C. 

      Only replace gaskets in high-pressure/high-temperature ducting.

    • D. 

      Always reuse a gasket because it is already shaped to fit the ducts.

  • 25. 
    (603) What type of high-pressure/high-temperature flange ducting does not require a gasket?
    • A. 

      Clamp.

    • B. 

      Bolted.

    • C. 

      Beaded.

    • D. 

      Compressible.

Back to Top Back to top