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

  • A machine used to raise the pressure of air is called


  • Options
  • A. gas turbine
  • B. I.C engine
  • C. compressor
  • D. air motor

  • Correct Answer
  • compressor 

    • Compressors, Gas Dynamics and Gas Turbines problems

    Search Results

    • 1. The operation of lifts, rams and pumps make use of compressed air.

    • Options
    • A. Yes
    • B. No
      • Discuss
    • 2. The ratio of the net work obtained from the gas turbine plant to the turbine work is known as

    • Options
    • A. compression ratio
    • B. work ratio
    • C. pressure ratio
    • D. none of these
      • Discuss
    • 3. A closed cycle gas turbine consists of a

    • Options
    • A. compressor
    • B. heating chamber
    • C. cooling chamber
    • D. all of these
      • Discuss
    • 4. The pressure ratio in a centrifugal compressor can be increased by increasing the tip speed and lowering the inlet temperature.

    • Options
    • A. Correct
    • B. Incorrect
      • Discuss
    • 5. In jet propulsion power unit, the inlet duct of diverging shape is used for converting kinetic energy of air into pressure energy.

    • Options
    • A. True
    • B. False
      • Discuss
    • 6. In a jet engine, the compression varies as the square of the speed.

    • Options
    • A. Correct
    • B. Incorrect
      • Discuss
    • 7. Air motors work on the cycle which is the reverse of the reciprocating air compressor cycle.

    • Options
    • A. Agree
    • B. Disagree
      • Discuss
    • 8. In gas turbines, the work input with intercooling is __________ the work input with no intercooling.

    • Options
    • A. less man
    • B. more than
      • Discuss
    • 9. In reciprocating air compressors, isothermal efficiency is used for all sorts of calculations.

    • Options
    • A. Correct
    • B. Incorrect
      • Discuss
    • 10. The perfect intercooling, in multistage compression, means that the temperature of air at inlet to subsequent stages is equal to the initial temperature.

    • Options
    • A. Agree
    • B. Disagree
      • Discuss

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