CDC 2a651s Volume 2 By CDCmaster

88 Questions | Total Attempts: 92

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Aircraft Quizzes & Trivia

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Questions and Answers
  • 1. 
    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. 
    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

  • 3. 
    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

  • 4. 
    "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

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

      Work

    • B. 

      Power

    • C. 

      Inertia

    • D. 

      Friction

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

      Available horsepower

    • B. 

      Thrust produced

    • C. 

      Potential energy

    • D. 

      Efficiency ratio

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

      Turbine

    • B. 

      Diffuser

    • C. 

      Compressor

    • D. 

      Combustion

  • 8. 
    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. 
    Which section of a jet engine introduces and burns fuel?
    • A. 

      Turbine

    • B. 

      Diffuser

    • C. 

      Compressor

    • D. 

      Combustion

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

      10500

    • B. 

      15000

    • C. 

      18500

    • D. 

      40000

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

      Energy

    • B. 

      Momentum

    • C. 

      Thermal efficiency

    • D. 

      Propulsive efficiency

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

      Mechanical efficiency

    • B. 

      Overall efficiency

    • C. 

      Power efficiency

    • D. 

      Thrust efficiency

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

      Potentiometer

    • B. 

      Psychrometer

    • C. 

      Pyrometer

    • D. 

      Barometer

  • 14. 
    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. 
    Due to the divergent design of a diffuser, air pressure
    • A. 

      Remains the same

    • B. 

      Fluctuates

    • C. 

      Decreases

    • D. 

      Increases

  • 16. 
    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. 
    Where is the highest point of temperature reached in an engine?
    • A. 

      Tailpipe

    • B. 

      Exhaust cone

    • C. 

      Turbine section

    • D. 

      Combustion section

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

      Pressure and drain (P&D) valve

    • B. 

      Fuel control

    • C. 

      Fuel nozzle

    • D. 

      Fuel pump

  • 19. 
    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. 
    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. 
    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. 
    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. 
    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. 
    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. 
    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

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