2A656 Aircraft Electrical And Environmental Systems Journeyman Volume 4

86 Questions | Total Attempts: 68

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2A656 Aircraft Electrical And Environmental Systems Journeyman Volume 4 - Quiz

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Questions and Answers
  • 1. 
    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. 
    Bleed air is usually taken from this aircraft engine section.
    • A. 

      Intake

    • B. 

      Turbine

    • C. 

      Exhaust

    • D. 

      Compressor

  • 3. 
    What is the approximate pressure and maximum temperature of engine bleed air as it is tapped from the engine compressor section
    • A. 

      100 psi and 700 degrees F

    • B. 

      150 psi and 750 degrees F

    • C. 

      200 psi and 900 degrees F

    • D. 

      250 psi and 950 degrees F

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

      Thermocouples

    • B. 

      Fuel control valve

    • C. 

      Load control valve

    • D. 

      Bleed air control governor

  • 5. 
    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. 
    What engine bleed air valve prevents air from being lost through he engine when it is shutdown?
    • A. 

      Check

    • B. 

      Shut off

    • C. 

      Isolation

    • D. 

      Crossover

  • 7. 
    This component stops the flow of air to the air-conditioning system
    • A. 

      Pressure limiter

    • B. 

      Flow control valve

    • C. 

      Air regulator valve

    • D. 

      System shut off valve

  • 8. 
    If electrical power is interrupted to the solenoid of an electrically controlled, pneumatically operated air-conditioning system shut off 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 requirments

  • 9. 
    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. 
    Due to 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. 
    What is the bleed air system component that controls the air flow by protecting downstream components from excessive pressure?
    • A. 

      Orifice

    • B. 

      Pressure limiter

    • C. 

      Pressure regulator

    • D. 

      Flow control valve

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

      Inlet pressure

    • B. 

      Outlet pressure

    • C. 

      Inlet temperature

    • D. 

      Differential pressure

  • 13. 
    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 actuating diaphram

    • D. 

      The down stream pressure port receives 70 pounds per min airflow

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

      Inlet and throat of venturi

    • B. 

      Outlet and inlet of venturi

    • C. 

      Outlet and throat of venturi

    • D. 

      Inlet, outlet, and throat of venturi

  • 15. 
    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 shut off valve

    • D. 

      Air pressure regulator and shut off valve

  • 16. 
    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 pressure is supplied to the flow control valve

    • D. 

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

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

      Pressure limiter

    • B. 

      Air flow regulator

    • C. 

      Pressure regulator

    • D. 

      Flow control valve

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

      Lockout butterfly

    • B. 

      Pneumatic switch

    • C. 

      Pneumatic thermostat

    • D. 

      Break away plug assembly

  • 19. 
    The downstream air temperature of the bleed air air-conditioning system has exceeded the predetermined temperature and has cause the butterfly valve to close. what flow control and shutoff switch now opens?
    • A. 

      Fusible

    • B. 

      Thermal

    • C. 

      Pnuematic

    • D. 

      Breakaway

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

      Titanium

    • B. 

      Aluminum

    • C. 

      Stainless steel

    • D. 

      Aluminum/ nickel alloy

  • 21. 
    What tool do you use to install high pressure/ high temperature v band clap to ensure it is aligned and sealed properly?
    • A. 

      Screwdriver

    • B. 

      Center punch

    • C. 

      Rawhide mallet

    • D. 

      Ball peen hammer

  • 22. 
    While installing a bleed air system bolted flanged duct end, use a metal or fiber gasket, align the flange, and insert the bottom bolt first to form a cradle. then you install the remaining bolt and tightened all the nuts. after the installation is complete, you preform an op check that reveals a leak. what important procedure was overlooked?
    • A. 

      Sealant compound was not used with the gasket

    • B. 

      Flange bolts were not torqued in the proper sequence

    • C. 

      Flange was not tapped with rawhide mallet while torquing

    • D. 

      Gasket should have been installed before cradle bolts were installed

  • 23. 
    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. 
    What important fact must you remember, that can be over looked, when replacing gaskets used in aircraft ducting?
    • A. 

      Only replace gaskets if they are distorted

    • B. 

      Always install 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 duct

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

      Clamp

    • B. 

      Bolted

    • C. 

      Beaded

    • D. 

      Compressible

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