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

  • A rocket engine uses __________ for the combustion of its fuel.


  • Options
  • A. surrounding air
  • B. compressed atmospheric air
  • C. its own oxygen
  • D. none of these

  • Correct Answer
  • its own oxygen 

    • Compressors, Gas Dynamics and Gas Turbines problems

    Search Results

    • 1. Workdone by an air compressor __________ upon the way in which the air is compressed.

    • Options
    • A. depends
    • B. does not depend
      • Discuss
    • 2. The compressor capacity will be __________ if the temperature of intake air is lowest.

    • Options
    • A. lowest
    • B. highest
      • Discuss
    • 3. Reheating in a gas turbine

    • Options
    • A. increases the thermal efficiency
    • B. increases the compressor work
    • C. increases the turbine work
    • D. decreases the thermal efficiency
      • Discuss
    • 4. In a centrifugal compressor, the air enters the impeller axially and leaves the vane radially.

    • Options
    • A. Yes
    • B. No
      • Discuss
    • 5. The intercooler pressure, for minimum work required, for a two stage reciprocating air compressor, is given by (where p1 = Intake pressure of air, p2 = Intercooler pressure, and p3 = Delivery pressure of air)

    • Options
    • A. p2 = p1 x p3
    • B. p2 = p1/p3
    • C. p2 = p1 x p3
    • D. p2 = p3/p1
      • Discuss
    • 6. 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
    • 7. 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
    • 8. A closed cycle gas turbine consists of a

    • Options
    • A. compressor
    • B. heating chamber
    • C. cooling chamber
    • D. all of these
      • Discuss
    • 9. 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
    • 10. The operation of lifts, rams and pumps make use of compressed air.

    • Options
    • A. Yes
    • B. No
      • Discuss

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