CDC 2a651s Volume 3 By CDCmaster

110 Questions | Total Attempts: 59

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CDC 2a651s Volume 3 By CDCmaster

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Questions and Answers
  • 1. 
    What is the composition of JP-8 fuel?
    • A. 

      Gasoline and kerosene

    • B. 

      Gasoline and diesel fuel

    • C. 

      Diesel fuel and kerosene

    • D. 

      Diesel fuel and aviation gasoline

  • 2. 
    At room temperature, how many times longer will it take water to settle out of JP-8 than out of gasoline? 
    • A. 

      Two

    • B. 

      Three

    • C. 

      Four

    • D. 

      Five

  • 3. 
    Jet aircraft operating at moderately high altitudes increase the fuel system's susceptibility to an icing condition, further aggravated by the
    • A. 

      Lower viscosity of jet fuels

    • B. 

      Higher viscosity of jet fuels

    • C. 

      Lower viscosity of free water

    • D. 

      Higher viscosity of free water

  • 4. 
    The main fuel control allows the jet engine to safely accelerate, reducing the possibility of
    • A. 

      Flameout

    • B. 

      Turbine seizure

    • C. 

      Compressor shift

    • D. 

      Overtemperature

  • 5. 
    During a visual inspection, how can you tell when a fuel filter is clogged?
    • A. 

      A green flag pops out of the filter

    • B. 

      Fuel pressure from the fuel pump is low

    • C. 

      A differential pressure indicator is actuated

    • D. 

      There is no way to tell without disassembling the filter

  • 6. 
    On a dual spool, axial-flow engine, what controls thrust production of the engine?
    • A. 

      Regulating engine RPM

    • B. 

      Regulating compressor discharge pressure

    • C. 

      Controlling turbine exhaust pressure

    • D. 

      Controlling turbine inlet temperature

  • 7. 
    During jet engine deceleration, a hydromechanical fuel control schedules fuel flow as a function of
    • A. 

      RPM

    • B. 

      Inlet temperature

    • C. 

      Burner pressure

    • D. 

      Inlet pressure

  • 8. 
    What type of fuel control uses items such as thermocouples, relays, amplifiers, and solenoids to help control a jet engine?
    • A. 

      Pneumatic

    • B. 

      Fuel injection

    • C. 

      Hydromechanical

    • D. 

      Electrohydromechanical

  • 9. 
    Which term describes a jet engine fuel metering device that is really two fuel controls in one component?
    • A. 

      Unified

    • B. 

      Combined

    • C. 

      Biomechanical

    • D. 

      Electrosecondary

  • 10. 
    The F100 UFC senses certain variables from the engine through the use of
    • A. 

      A closed loop design

    • B. 

      An open circuit design

    • C. 

      The feedback control unit

    • D. 

      A direct mechanical connection to all engine sensors

  • 11. 
    If the safety seals on a fuel system component are broken or removed, and you suspect the factory adjustment was altered, you should
    • A. 

      Adjust and reseal the component

    • B. 

      Keep the component in service to meet the mission

    • C. 

      Forward the component to he authorized depot for reflow and resealing

    • D. 

      Continue to keep the component in service if it is documented as a red diagonal on Form 781A, Hydromechanical Fuel Control

  • 12. 
    Calibration and/or adjustment screws that require setting during an engine trim procedure must be 
    • A. 

      Replaced

    • B. 

      Die marked

    • C. 

      Safety sealed and/or lockwired

    • D. 

      Treated with a thread locking compound

  • 13. 
    When in the primary mode, what controls the operation of the F100-PW-220 engine?
    • A. 

      MEC

    • B. 

      PMG

    • C. 

      TSFC

    • D. 

      DEEC

  • 14. 
    On an F100-PW-220 engine, the DEEC is cooled by
    • A. 

      Oil

    • B. 

      Fuel

    • C. 

      Ram air

    • D. 

      Hydraulic fluid

  • 15. 
    For actuation of the variable vane systems on an F100-PW220 engine, the MFC provides both the CIVV and
    • A. 

      Rear compressor variable vane actuators with pneumatic (air) pressure

    • B. 

      Rear compressor variable vane actuators with fuel pressure

    • C. 

      Variable exhaust nozzle actuators with pneumatic pressure

    • D. 

      Variable exhaust nozzle actuators with fuel pressure

  • 16. 
    Which F100-PW-220 engine fuel system component controls pressurization of the core engine fuel system?
    • A. 

      Fuel nozzle

    • B. 

      P&D valve

    • C. 

      N2 sensor

    • D. 

      Tt 2.5 sensor

  • 17. 
    Which stage of compressor air drives the augmenter fuel pump on an F100-PW-220 engine?
    • A. 

      7th

    • B. 

      10th

    • C. 

      13th

    • D. 

      14th

  • 18. 
    On the F100-PW-220 engine, which component controls the augmenter fuel control?
    • A. 

      Fuel pump

    • B. 

      Fuel pump controller

    • C. 

      Signature elimination probe

    • D. 

      DEEC

  • 19. 
    Core engine fuel flow sequence on an F100-PW-220 engine starts at the main fuel pump and then goes through the
    • A. 

      AFP, AFC fuel/oil cooler, P&D, and fuel nozzles

    • B. 

      MFC, fuel/oil cooler, P&D, and fuel nozzles

    • C. 

      AFC,AFP, fuel/oil cooler, P&D, and fuel nozzles

    • D. 

      Fuel/oil cooler, P&D, MFC, and fuel nozzles

  • 20. 
    When classified as to structure, which of the following is not a type of an oil pump?
    • A. 

      Gear

    • B. 

      Gerotor

    • C. 

      Rotogear

    • D. 

      Sliding vane

  • 21. 
    Which type of oil pump consists of a gear and rotor within a housing?
    • A. 

      Gear

    • B. 

      Gerotor

    • C. 

      Rotogear

    • D. 

      Sliding vane

  • 22. 
    One micron is a metric linear measurement that is equal to
    • A. 

      1/25 inch

    • B. 

      1/250 inch

    • C. 

      1/2500 inch

    • D. 

      1/25000 inch

  • 23. 
    Chip detectors have an electrical connection for making which type of check?
    • A. 

      AC high-voltage

    • B. 

      DC high voltage

    • C. 

      Continuity

    • D. 

      Polarity

  • 24. 
    Which type of valve permits oil flow in only one direction?
    • A. 

      Check

    • B. 

      Relief

    • C. 

      Bypass

    • D. 

      Pressurizing

  • 25. 
    Which type of oil cooler operates on the same principle as a radiator in an automobile?
    • A. 

      Air/oil

    • B. 

      Fuel

    • C. 

      Hydraulic

    • D. 

      Pneumatic

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