2A651 CDC 3 (2013)

100 Questions | Total Attempts: 41

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CDC Quizzes & Trivia

Unit Review Exercise 2a651 cdc 3 practice test Volume 3 Made 2013


Questions and Answers
  • 1. 
    (401) 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. 
    (401) At room teperature, 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. 
    (401) 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. 
    (402) 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. 
    The purpose of a fuel/oil cooler in a fuel system is to
    • A. 

      Heat the fuel and cool the oil.

    • B. 

      Cool the fuel and cool the oil.

    • C. 

      Heat the fuel and heat the oil.

    • D. 

      Cool the fuel and heat the oil.

  • 6. 
    (402) 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 form the fuel pump is low.

    • C. 

      A differential pressure indicator is actuated.

    • D. 

      There is no way to tell without disassembling the filter.

  • 7. 
    (403) On a dueal-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.

  • 8. 
    (403) 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.

  • 9. 
    (403) 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.

  • 10. 
    (403) Which term describes a jet engine fuel metering device that is really two fuel controls in one component?
    • A. 

      Unified.

    • B. 

      Combined.

    • C. 

      Bimechanical.

    • D. 

      Electrosecondary.

  • 11. 
    (403) 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. 

      Applied a thread locking compound.

  • 12. 
    (404) When in the primary mode, what controls the operation of the F100-PW-220 engine?
    • A. 

      MEC.

    • B. 

      PMG.

    • C. 

      TSFC.

    • D. 

      DEEC.

  • 13. 
    (404) On an F100-PW-220 engine, the DEEC is cooled by
    • A. 

      Oil.

    • B. 

      Fuel.

    • C. 

      Ram air.

    • D. 

      Hydraulic fluid.

  • 14. 
    (404) On an F100-PW-220 engine, how many modes is the MFC capable of operating in?
    • A. 

      One.

    • B. 

      Two.

    • C. 

      Three.

    • D. 

      Four.

  • 15. 
    (404) 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.

  • 16. 
    (404) Which stage of compressor air drives the augmenter fuel pump on an F100-PW-220 engine?
    • A. 

      7th.

    • B. 

      10th.

    • C. 

      13th.

    • D. 

      14th.

  • 17. 
    (404) 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.

  • 18. 
    (405) On the T56 engine, how many and what type of fuel pumps are contained in the fuel pump and filter assembly?
    • A. 

      3 gear; 1 boost.

    • B. 

      2 gear; 2 boost.

    • C. 

      2 gear; 1 boost.

    • D. 

      1 gear; 2 boost.

  • 19. 
    (405) On a T56 engine, what controls the rotary movement of the fuel control metering valve?
    • A. 

      Temperature.

    • B. 

      Engine speed.

    • C. 

      Throttle position.

    • D. 

      Compressor inlet pressure.

  • 20. 
    (405) Which T5 engine component receives 120 percent of the engine fuel requirement?
    • A. 

      TD valve.

    • B. 

      Fuel control.

    • C. 

      TD control.

    • D. 

      Fuel nozzle.

  • 21. 
    (405) In addition to the visual inspection, what other type of inspection does the T-56 engine fuel nozzle require?
    • A. 

      Nondestructive.

    • B. 

      Spray pattern.

    • C. 

      Pre-torque.

    • D. 

      Ultrasonic.

  • 22. 
    (405) In what position must the TD valve sqithches be placed in ordr to make the T56 engine fuel trimming system inoperative?
    • A. 

      OFF.

    • B. 

      NULL.

    • C. 

      AUTO.

    • D. 

      LOCKED.

  • 23. 
    (405) On the T56 engine, what compares the desired throttle setting from the coordinator with the actual TIT signal from the thermocouples?
    • A. 

      TD valve.

    • B. 

      Speed-sensitive control.

    • C. 

      TD potentiometers.

    • D. 

      TD amplifier.

  • 24. 
    (405) Which T56 engine component sends the fuel to the fuel manifold?
    • A. 

      TD valve.

    • B. 

      Main fuel pump.

    • C. 

      TD amplifier.

    • D. 

      Fuel control.

  • 25. 
    (405) On the T56 engine, the manifold pressure switch opens to denergize the fuel enrichment relay when fuel pressure, in psi, in the manifold reaches
    • A. 

      30 psi.

    • B. 

      40 psi.

    • C. 

      50 psi.

    • D. 

      60 psi.

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