2A651 Volume 2 Ure's

100 Questions | Total Attempts: 225

SettingsSettingsSettings
Please wait...
2A651 Quizzes & Trivia

2a651 Volume 2 ure's


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. 
    Which law may you sum up with two words: action and reaction?
    • 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

  • 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 ability to do work is the definition of?
    • A. 

      Energy

    • B. 

      Inertia

    • C. 

      Friction

    • D. 

      Velocity

  • 5. 
    What does fuel for an engine represent?
    • A. 

      Thrust produced

    • B. 

      Efficieny ratio

    • C. 

      Potential energy

    • D. 

      Availble horsepower

  • 6. 
    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

  • 7. 
    Which section of a jet engine introduction and burns fuel?
    • A. 

      Turbine

    • B. 

      Diffuser

    • C. 

      Compressor

    • D. 

      Combustion

  • 8. 
    Which method of producing thrust does a turboprop engine use?
    • A. 

      Using only the energy expended through the exhaust nozzle to propel the aircraft forward

    • B. 

      Using the same working fluid for propulsive force as that used within the engine

    • C. 

      Accelerating a large mass of air through a small velocity change

    • D. 

      Moving a small quantity of air through a large velocity change

  • 9. 
    Which type of horsepower is delivered to the propeller for useful work?
    • A. 

      Brake

    • B. 

      Indicated

    • C. 

      Frictional

    • D. 

      Equivalent shaft

  • 10. 
    Which type of horsepower determines the performance of the engine-propeller combination?
    • A. 

      Brake

    • B. 

      Indicated

    • C. 

      Frictional

    • D. 

      Equivalent shaft

  • 11. 
    The two fluids combined to make up common jet fuel are?
    • A. 

      Gasoline and oil

    • B. 

      Kerosene and oil

    • C. 

      Gasoline and water

    • D. 

      Kerosene and gasoline

  • 12. 
    Which is not a method of heat transfer?
    • A. 

      Radiation

    • B. 

      Convection

    • C. 

      Penetration

    • D. 

      Conduction

  • 13. 
    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

  • 14. 
    Where is the highest point of temperature reached in an engine?
    • A. 

      Tailpipe

    • B. 

      Exhaust cone

    • C. 

      Turbine section

    • D. 

      Combustion section

  • 15. 
    Which engine component meters fuel for combustion?
    • A. 

      P&D valve

    • B. 

      Fuel pump

    • C. 

      Fuel control

    • D. 

      Fuel nozzles

  • 16. 
    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. 

      The energy operates the anti-ice system

    • D. 

      The energy is returned to the compressor

  • 17. 
    On an average, what percent of all the energy produced by the fuel is required to maintain the engine operating cycle?
    • A. 

      50

    • B. 

      60

    • C. 

      70

    • D. 

      80

  • 18. 
    What directs the gases onto the first-stage turbine wheel blades in a jet engine?
    • A. 

      Turbine wheel blades

    • B. 

      Combustion chamber

    • C. 

      Turbine stator

    • D. 

      Flameholder

  • 19. 
    A jet engine derives its name from its design in that it uses?
    • A. 

      Turbo-superchargers within the engine

    • B. 

      A turbine-type compressor to maintain power

    • C. 

      Nozzles which are called jets within the engine

    • D. 

      A gas-driven turbine wheel to drive its compressor

  • 20. 
    Vane-type fuel pumps used in jet engines are similar to?
    • A. 

      Sliding-vane air compressors

    • B. 

      Piston pump air compressors

    • C. 

      Roots air compressors

    • D. 

      Turbo-superchargers

  • 21. 
    Which condition reduces the efficiency of a centrifugal compressor?
    • A. 

      Resultant velocity

    • B. 

      Tangential velocity

    • C. 

      Pressure pulsations

    • D. 

      Air mass leaving the impeller at great velocities

  • 22. 
    Stationary vanes positioned between rotor discs in a compressor are used to?
    • A. 

      Direct air and increase pressure

    • B. 

      Direct hot gases rearward

    • C. 

      Increase backup pressure

    • D. 

      Prolong compressor life

  • 23. 
    The jet engine compressor that is cheaper to manufacture is the?
    • A. 

      Axial-flow type, because of its size

    • B. 

      Centrifugal type, because of its size

    • C. 

      Axial-flow type, because of its fewer parts.

    • D. 

      Centrifugal type, because of its fewer parts

  • 24. 
    The precentage of combustion efficiency of a gas turbine is usually between?
    • A. 

      60 and 70

    • B. 

      65 and 75

    • C. 

      75 and 95

    • D. 

      95 and 100

  • 25. 
    What is the most probable cuase of a flameout of a jet engine flying at 40,000 feet with a constant engine rpm of 50 percent?
    • A. 

      The rpm is too low

    • B. 

      A decrease in barometric pressure

    • C. 

      The failure of the breather pressurizing valve

    • D. 

      Excessive ducting of air from the compressor into the combustion chamber

Back to Top Back to top