Volume 2 Unit Review Exercises Aircraft Fuel System

80 Questions | Total Attempts: 222

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Aircraft Quizzes & Trivia

Try your hand at another one of our many aircraft unit review exercises, as we put you to the test against a series of questions regarding Aircraft Fuel Systems. How do they work? You tell us!


Questions and Answers
  • 1. 
    1. (201) What type of pumps is used for engine feed in the FWD and AFT reservoir tanks of a fighter aircraft?
    • A. 

      Dual-impeller, turbine-driven.

    • B. 

      Single-impeller, turbine-driven.

    • C. 

      Dual-impeller, electrically driven.

    • D. 

      Single-impeller, electrically driven

  • 2. 
    2. (201) The crossfeed valve on a fighter aircraft is a
    • A. 

      Cable-operated gate valve.

    • B. 

      Motor-operated butterfly valve.

    • C. 

      Fuel pressure-operated gate valve

    • D. 

      Solenoid-operated butterfly valve

  • 3. 
    3. (201) On a fighter aircraft fuel system, a thermally-actuated valve in the heat exchanger outlet prevents fuel from exceeding
    • A. 

      140ºF

    • B. 

      160ºF.

    • C. 

      180ºF

    • D. 

      200ºF

  • 4. 
    4. (202) To use body tank fuel to feed the engines on a tanker aircraft, the
    • A. 

      Air refueling pumps must be operated.

    • B. 

      Main tank pumps must be operated.

    • C. 

      Alternate pumps must be operated

    • D. 

      Override pumps must be operated

  • 5. 
    5. (202) To feed all engines from the center wing tank on a tanker aircraft, the
    • A. 

      Gravity feed valve must be opened.

    • B. 

      Override wing valves must be opened.

    • C. 

      Tank to manifold valves must be opened

    • D. 

      Air refueling to engine manifold valves must be opened

  • 6. 
    6. (203) The output pressure and the flow ratings of a centrifugal pump are greater than the amount the system needs in order to
    • A. 

      Provide an ample supply of fuel in case of a single pump failure.

    • B. 

      Prevent fuel boiling and evaporation in the wing tanks at high altitudes.

    • C. 

      Provide fuel to the engines during negative Gs or inverted flight conditions.

    • D. 

      Prevent the reverse flow of fuel from a pump with a greater pressure output.

  • 7. 
    7. (203) When fuel supply is required during negative gravity conditions,
    • A. 

      A rotary-vane centrifugal pump is used.

    • B. 

      A dual-impeller centrifugal pump is used.

    • C. 

      An in-line ejector centrifugal pump is used.

    • D. 

      A top-mounted pump centrifugal pump is used.

  • 8. 
    8. (203) What feature prevents foreign objects from holding the bypass valve open in a dual-impeller pump?
    • A. 

      A two-way check valve.

    • B. 

      A one-way check valve.

    • C. 

      An impeller screen.

    • D. 

      An inlet screen.

  • 9. 
    9. (203) Which of the following is not an advantage of the quick change electrically drive fuel pump?  
    • A. 

      Requires special tools to install.

    • B. 

      It isn’t possible to install the wrong pump.

    • C. 

      Shortens the time required for pump changes.

    • D. 

      Does not require either physically entering or completely defueling the tank.

  • 10. 
    10. (204) The arrow stamped on the body of a check valve indicates the
    • A. 

      Direction of fuel flow.

    • B. 

      Direction of restricted flow.

    • C. 

      Location of the drilled hole in the valve.

    • D. 

      Location of the manufacturer’s data block.

  • 11. 
    11. (204) The flapper on a flapper-type check valve is opened by
    • A. 

      Spring pressure.

    • B. 

      Hydromechanical action.

    • C. 

      Gravity flow or pump pressure.

    • D. 

      An electrical impulse to the flapper mechanism.

  • 12. 
    12. (204) What shutoff valve cannot withstand extreme pressures?
    • A. 

      Disc.

    • B. 

      Butterfly.

    • C. 

      Sliding gate.

    • D. 

      Rotary plug.

  • 13. 
    13. (204) What feature prevents excessive pressure from building up in trapped lines or within the body of a sliding gate valve?
    • A. 

      Pressure relief valves

    • B. 

      Thermal relief valves.

    • C. 

      One-way check valves.

    • D. 

      Spring-loaded check valves.

  • 14. 
    14. (204) What type of seal is found between the disc and valve body on a disc-type valve?
    • A. 

      V-ring.

    • B. 

      O-ring

    • C. 

      Gasket.

    • D. 

      Metal-to-metal

  • 15. 
    15. (205) The best method for troubleshooting a fighter engine feed system component you suspect of leaking is to
    • A. 

      Operate the component while looking for leaks.

    • B. 

      Pressurize the manifold with fuel and look for leaks

    • C. 

      Stand-test with fuel for 30 minutes and look for leaks

    • D. 

      Pressurize the manifold with air and listen for leaks.

  • 16. 
    16. (205) You are troubleshooting a boost pump problem on a fighter aircraft. To do this properly, your first step is to check for
    • A. 

      Power to the boost pump.

    • B. 

      A pressure switch reading

    • C. 

      Continuity of the pressure switch.

    • D. 

      A direct pressure reading of the pump.

  • 17. 
    17. (206) On a tanker aircraft, where must fuel be routed in order to feed any engine from any main tank?
    • A. 

      Forward body tank.

    • B. 

      Crossfeed manifold.

    • C. 

      Transfer manifold.

    • D. 

      Center wing tank.

  • 18. 
    18. (207) You are troubleshooting a malfunction of the crossfeed system on a tanker aircraft when you determine there is no pressure available to route fuel to the crossfeed manifold. The most probable cause of this malfunction is
    • A. 

      A stuck open check valve.

    • B. 

      A malfunctioning boost pump.

    • C. 

      An inoperative pressure transmitter

    • D. 

      Foreign object damage stuck in a shutoff valve.

  • 19. 
    19. (208) The purpose of the power transfer method on a fighter aircraft is to
    • A. 

      Pressurize the tanks only.

    • B. 

      Augment fuel transfer only.

    • C. 

      Pressurize and scavenge the tanks.

    • D. 

      Augment fuel transfer and scavenge the tanks

  • 20. 
    20. (208) How many pumps are used in the power transfer system on a fighter aircraft?
    • A. 

      Two.

    • B. 

      Three.

    • C. 

      Four

    • D. 

      Six.

  • 21. 
    21. (208) On a fighter aircraft, what type of pumps are the scavenge pumps and where are they located?
    • A. 

      Ejector-type; located in the F–2 tank

    • B. 

      Turbine-type; located in the F–2 tank.

    • C. 

      Ejector-type; located in the F–1 tank.

    • D. 

      Turbine-type; located in the F–1 tank.

  • 22. 
    22. (208) On a fighter aircraft,
    • A. 

      The external centerline tank will transfer first.

    • B. 

      The left wing external tank will transfer first.

    • C. 

      The right wing external tank will transfer first.

    • D. 

      Both wing external tanks will transfer first.

  • 23. 
    23. (209) You are troubleshooting a problem on a fighter aircraft. You find that none of the external tanks transferred fuel with the select switch in NORM position; however, the external wing tanks did transfer fuel with the select switch in WING FIRST position. The most probable cause of this malfunction is the
    • A. 

      Inoperative wing float valve.

    • B. 

      External transfer shutoff valve is bad.

    • C. 

      External vent and pressurization valve is bad.

    • D. 

      Centerline refuel/transfer valve is inoperative.

  • 24. 
    24. (209) You are troubleshooting a problem on a fighter aircraft when you discover that none of the external tanks transfer fuel, regardless of the switch positions. The most probable cause of this malfunction is the
    • A. 

      Transfer pumps are inoperative.

    • B. 

      Refuel/transfer valves are inoperative.

    • C. 

      Vent and pressurization valve is inoperative.

    • D. 

      Centerline tank manual shutoff valve is inoperative.

  • 25. 
    25. (210) The fuel level control valve on a cargo aircraft is operated
    • A. 

      Hydromechanically and controlled by fuel pressure.

    • B. 

      Hydromechanically and controlled by a solenoid.

    • C. 

      And controlled hydromechanically.

    • D. 

      And controlled by a solenoid.

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