5 Level Volume 2

88 Questions | Total Attempts: 71

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5 Level Volume 2

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Questions and Answers
  • 1. 
     (201) An aircraft taxiing at a steady speed can be used to demonstrate
    • A. 

      Bernoulli’s principle.

    • B. 

      Newton’s first law of motion.

    • C. 

      Newton’s second law of motion.

    • D. 

      Newton’s third law of motion.

  • 2. 
     (201) Which type of duct would decrease the velocity and increase the pressure of a gas as it passes through?
    • A. 

      Elbow.

    • B. 

      Straight.

    • C. 

      Divergent.

    • D. 

      Convergent.

  • 3. 
     (201) "The combination of decreased pressure above an airfoil, and the increased pressure below the airfoil produces lift" is best described by
    • A. 

      Bernoulli’s principle.

    • B. 

      Newton’s first law of motion.

    • C. 

      Newton’s second law of motion.

    • D. 

      Newton’s third law of motion.

  • 4. 
     (201) Newton’s third law of motion explains why an operating jet engine produces
    • A. 

      Forward thrust.

    • B. 

      Forward acceleration.

    • C. 

      Increased acceleration.

    • D. 

      Decreased acceleration.

  • 5. 
     (202) Foot-pounds and inch-pounds are units of measure for
    • A. 

      Work.

    • B. 

      Power.

    • C. 

      Inertia.

    • D. 

      Friction.

  • 6. 
     (202) What does fuel for an engine represent?
    • A. 

      Available horsepower.

    • B. 

      Thrust produced.

    • C. 

      Potential energy.

    • D. 

      Efficiency ratio.

  • 7. 
     (203) Which section of a jet engine continually supplies air and maintains pressure?
    • A. 

      Turbine.

    • B. 

      Diffuser.

    • C. 

      Compressor.

    • D. 

      Combustion.

  • 8. 
    (203) The temperature of compressed air in a jet engine must be raised to
    • A. 

      Increase energy.

    • B. 

      Decrease energy.

    • C. 

      Increase volume.

    • D. 

      Decrease volume

  • 9. 
    (203) Which section of a jet engine introduces and burns fuel?
    • A. 

      Turbine.

    • B. 

      Diffuser.

    • C. 

      Compressor.

    • D. 

      Combustion.

  • 10. 
    (204) How many British thermal units (Btu) does the heat content per pound of kerosene produce?
    • A. 

      10,500.

    • B. 

      15,000.

    • C. 

      18,500

    • D. 

      40,000.

  • 11. 
    (204) The efficiency of a jet engine is often referred to as
    • A. 

      Energy.

    • B. 

      Momentum.

    • C. 

      Thermal efficiency.

    • D. 

      Propulsive efficiency.

  • 12. 
    (204) The product of thermal efficiency and propulsive efficiency is
    • A. 

      Mechanical efficiency.

    • B. 

      Overall efficiency.

    • C. 

      Power efficiency.

    • D. 

      Thrust efficiency.

  • 13. 
    (205) To measure barometric pressure, you would use a
    • A. 

      Potentiometer.

    • B. 

      Psychrometer.

    • C. 

      Pyrometer.

    • D. 

      Barometer.

  • 14. 
    (205) What effect does moisture content or humidity have on density of air?
    • A. 

      More moisture, more dense.

    • B. 

      More moisture, less dense.

    • C. 

      Less moisture, less dense.

    • D. 

      None.

  • 15. 
    (205) Due to the divergent design of a diffuser, air pressure
    • A. 

      Remains the same.

    • B. 

      Fluctuates.

    • C. 

      Decreases

    • D. 

      Increases

  • 16. 
    (205) The air temperature of a jet engine gradually rises across the compressor to the diffuser outlet as a result of
    • A. 

      Compression.

    • B. 

      Fuel expansion.

    • C. 

      Turbine discharge.

    • D. 

      Ambient temperature increase.

  • 17. 
    (205) Where is the highest point of temperature reached in an engine?
    • A. 

      Tailpipe.

    • B. 

      Exhaust cone.

    • C. 

      Turbine section.

    • D. 

      Combustion section.

  • 18. 
    (206) Which engine component meters fuel for combustion?
    • A. 

      Pressure and drain (P&D) valve.

    • B. 

      Fuel control.

    • C. 

      Fuel nozzle.

    • D. 

      Fuel pump.

  • 19. 
    (206) What happens to the energy that is absorbed by the turbine wheel?
    • A. 

      50 percent is used for accessories.

    • B. 

      60 percent is used for accessories.

    • C. 

      It is returned to the compressor.

    • D. 

      It operates the anti-ice system.

  • 20. 
    (207) What is the required velocity for air and gases flowing through a jet engine?
    • A. 

      Low velocity at all times.

    • B. 

      Less velocity exiting than entering.

    • C. 

      Equal velocity entering and exiting.

    • D. 

      Greater velocity exiting than entering.

  • 21. 
    (207) The velocity of the stream of air that flows through a jet engine reaches its highest point at the
    • A. 

      Ejector nozzle.

    • B. 

      Combustion section.

    • C. 

      Turbine exhaust cone

    • D. 

      Turbine stator (nozzle diaphragm).

  • 22. 
    (207) What is the general flow of gases from the combustion chamber?
    • A. 

      At right angles to the rotor shaft.

    • B. 

      Parallel to the axis of the rotor shaft.

    • C. 

      At the same velocity as the rotor shaft.

    • D. 

      In a reverse direction from the rotor shaft.

  • 23. 
    (207) Gases enter the jet-engine’s first-stage turbine wheel blades from the
    • A. 

      Turbine wheel blades.

    • B. 

      Combustion chamber.

    • C. 

      Turbine stator.

    • D. 

      Flameholder.

  • 24. 
    (207) When two or more turbine wheels are used in a jet engine, which component is placed directly in front of each turbine wheel?
    • A. 

      Diffuser.

    • B. 

      Jet nozzle.

    • C. 

      Combustion chamber.

    • D. 

      Turbine stator (nozzle diaphragm).

  • 25. 
     (208) A jet engine derives its name from its design in that it uses
    • A. 

      An exhaust-gas-driven turbine wheel to drive its compressor.

    • B. 

      Nozzles which are called jet within the engine.

    • C. 

      A turbine-type compressor to maintain power.

    • D. 

      Turbo-superchargers within the engine.