2A655 Volume 3 Unit Review 1-60(Aircraft)

60 Questions | Total Attempts: 812

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Aircraft Quizzes & Trivia

Questions and Answers
  • 1. 
    (401)  If a hydraulic reservoir is pressurized to 25psi, what would be the minimum psi pressure in the return line to the reservoir?
    • A. 

      5

    • B. 

      25

    • C. 

      50

  • 2. 
    (402) Variable-volume pumps do not require a seperate pressure regulating device in the system because
    • A. 

      They deliver low pressure

    • B. 

      They have an integral compenator

    • C. 

      The case drain wil relieve high system pressure

  • 3. 
    (402) what happens as the drive shaft rotates on a Stratopower pump?
    • A. 

      Both the cylinder block and pistons rotate.

    • B. 

      The universal link and cylinder block rotates.

    • C. 

      The pistons move back and forth, and the cylinder block is stationary.

  • 4. 
    (402) In the Stratopower variable-volume pump, the piston are held in contact with the cam plate by the
    • A. 

      Fixed pivot

    • B. 

      Fixed pivot

    • C. 

      Nutating plate

  • 5. 
    (402) In order to change the direction of rotation of a hydraulic motor, what should be done?
    • A. 

      Change the foot values

    • B. 

      The head should be rotated 180 degrees

    • C. 

      Change the direction of fluid flow into the motor

  • 6. 
    (403)  What principle does a filter assembly with a differential pressure indicator operator?
    • A. 

      The increase of fluid viscosity as the temperature is lowered

    • B. 

      The difference between pressure entering the element and pressure leaving the element

    • C. 

      The spring loaded magnetic indicator postin pop-up when contaminated

  • 7. 
    (404) Which line is a manually-operated check valve usually installed?
    • A. 

      Pressure

    • B. 

      Supply

    • C. 

      Return

  • 8. 
    (404)  Which type of shutoff valve gives a positive indication of the position of the valve?
    • A. 

      Hydraulically operated

    • B. 

      Motor operated

    • C. 

      Manually operated

  • 9. 
    (404)  If a relief valve with a ball seat area of 1/6 sq. in to relive 1800psi. the spring tension would
    • A. 

      Be 1800 lbs

    • B. 

      Be 30 lbs with no back pressure

    • C. 

      Be 300 lbs with no back pressure

  • 10. 
    (405) A manual poppet-type selector valve is in a working position when the camshaft is rotated to
    • A. 

      Seat all forur poppets

    • B. 

      Seat both of the pressure poppets

    • C. 

      Unseat one pressure poppet and one return

  • 11. 
    (406)  What type of actuator has characteristic  of the travel of the piston will slow down when the piston nears either end of the cylinder?
    • A. 

      Tandem

    • B. 

      Internal locking

    • C. 

      Internal snubber

  • 12. 
    (406)  The difference between the a selector valve and a servo valve is that the
    • A. 

      Selector valve has four ports

    • B. 

      Servo valve will control fluid flow

    • C. 

      Servo valve is electrically operated

  • 13. 
    (406)  How is the selector valve in anonautomatic hydraulic actuating system controlled?
    • A. 

      By microswitches

    • B. 

      By mechanical sequencing

    • C. 

      Manually by the operated

  • 14. 
    (406)  In an electrical follow up system, the follow up action will catch up and neutralize the servo valve when the
    • A. 

      Input and followup transducers send the same signal to the amplifier

    • B. 

      Input and follow up transducers send the signal to the servo valve

    • C. 

      Servo valve and amplifier send the same signal to the unput transducer.

  • 15. 
    (406)  When a power control cylinder is in the manual mode, what compnent allows the fluid to flow from one side of the main actuator to the other
    • A. 

      Solenoid operated shutoff valve

    • B. 

      Bypass valve

    • C. 

      Servo ram

  • 16. 
    (407)  Which type of orifice allows normal speed of operation in one direction, but limits speed in the other
    • A. 

      Fixed

    • B. 

      Variable

    • C. 

      Check valve

  • 17. 
    (407)  Hydraulic flow regulators regulate fluid flow
    • A. 

      In both directions

    • B. 

      In one direction

    • C. 

      Only when there is macimum load on the actuator

  • 18. 
    (408)  If we needed to lower system pressure to a subsystem to prevent an actuator from overloading the airframe, what hydraulic valve would we need?
    • A. 

      Relief

    • B. 

      Flow control

    • C. 

      Pressure reducer

  • 19. 
    (408)  What is the purpose of installing sequence valves in a system?
    • A. 

      So only one system can operate at a time.

    • B. 

      To ensure that system actuators extend and retract at the same rate

    • C. 

      So one operation is performed before the rest of the system can operate

  • 20. 
    (408)  In a typical electrically sequenced system, what unit is used to ensure proper sequencing?
    • A. 

      Microswitch

    • B. 

      Thermal switch

    • C. 

      Priority valve

  • 21. 
    (408)  How long should you perform a leakage test on a swivel joint?
    • A. 

      2 min

    • B. 

      10 min

    • C. 

      20 min

  • 22. 
     (409)  In the hydraulic power system, when electrical power is lost, what will be the position of the soleniod operated shutoff valves?
    • A. 

      Open

    • B. 

      Closed

    • C. 

      Bypass

  • 23. 
    (409)  In an emergency, the shutoff valves of the engine- driven hydraulic pump may be operated by
    • A. 

      Stopping the engines

    • B. 

      Pulling the fire handles

    • C. 

      Pulling the circuit breakers

  • 24. 
    (409)  Refer to foldout 1.  If the fire control handle on No. 3 engine is pulled and the suction shutoff valve closes, but the pressure shutoff valve does not close, which component would yo suspect of being faulty
    • A. 

      Suction shutoff valve

    • B. 

      No. 3 engine relay

    • C. 

      Pressure shutoff valve

  • 25. 
    (410) When the pump low pressure warning light comes on while the engines are running and the pressure reading on the accumulator pressure gauge reads low, the first component that should be suspected if having a malfunction is the
    • A. 

      Snubber

    • B. 

      Accumulator

    • C. 

      Engine driven pump

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