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Home ‣ Mechanical Engineering ‣ Compressors, Gas Dynamics and Gas Turbines Comments
  • Question

  • A simple turbo-jet engine is basically a gas turbine engine equipped with a propulsive nozzle and diffuser.


  • Options
  • A. Agree
  • B. Disagree

  • Correct Answer
  • Agree 

    • Compressors, Gas Dynamics and Gas Turbines problems

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    • 1. The volume of air delivered in a medium capacity air compressor per unit time is

    • Options
    • A. 0.1 to 1.2 m3/s
    • B. 0.15 to 5 m3/s
    • C. above 5 m3/s
    • D. none of these
      • Discuss
    • 2. In a single stage, single acting reciprocating air compressor without clearance volume, the workdone is maximum during

    • Options
    • A. isothermal compression
    • B. isentropic compression
    • C. polytropic compression
    • D. none of these
      • Discuss
    • 3. In a high pressure compressor, the delivery pressure is

    • Options
    • A. 1 to 5 bar
    • B. 5 to 8 bar
    • C. 8 to 10 bar
    • D. 10 to 15 bar
      • Discuss
    • 4. If the clearance ratio for a reciprocating air compressor is 'K', then its volumetric efficiency is given by

    • Options
    • A.
    • B.
    • C.
    • D.
      • Discuss
    • 5. A turbo-prop is preferred to turbo-jet because

    • Options
    • A. it has high propulsive efficiency at high speeds
    • B. it can fly at super sonic speeds
    • C. it can fly at high elevations
    • D. it has high power for take off
      • Discuss
    • 6. The propulsive power of the rocket is (where v1 = Jet velocity, and v2 = Air-craft velocity)

    • Options
    • A.
    • B.
    • C.
    • D.
      • Discuss
    • 7. In n1 and n2 are the indices of compression for the first and second stage of compression, then the ratio of workdone on the first and second stages (W1/W2) with perfect intercoooing is given by

    • Options
    • A.
    • B.
    • C.
    • D.
      • Discuss
    • 8. A compressor at high altitudes will require __________ power.

    • Options
    • A. same
    • B. less
    • C. more
      • Discuss
    • 9. The operation of the reciprocating air motor is similar to reciprocating air compressor.

    • Options
    • A. True
    • B. False
      • Discuss
    • 10. Separators are generally used in air compressor installations

    • Options
    • A. before the intercooler
    • B. after the intercooler
    • C. between the aftercooler and receiver
    • D. before first stage suction
      • Discuss

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