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

  • In the aircraft propellers


  • Options
  • A. the propulsive matter is ejected from within the propelled body
  • B. the propulsive matter is caused to flow around the propelled body
  • C. its functioning does not depend upon the presence of air
  • D. none of the above

  • Correct Answer
  • the propulsive matter is ejected from within the propelled body 

    • Compressors, Gas Dynamics and Gas Turbines problems

    Search Results

    • 1. Which of the following statement is wrong?

    • Options
    • A. In a two stage reciprocating air compressor with complete intercooling, maximum work is saved.
    • B. The minimum work required for a two stage reciprocating air compressor is double the work required for each stage.
    • C. The ratio of the volume of free air delivery per stroke to the swept volume of the piston is called volumetric efficiency.
    • D. none of the above
      • Discuss
    • 2. Gas turbine as compared to steam turbine

    • Options
    • A. requires less space for installation
    • B. has compressor and combustion chamber
    • C. has less efficiency
    • D. all of these
      • Discuss
    • 3. The maximum delivery pressure in a rotary air compressor is

    • Options
    • A. 10 bar
    • B. 20 bar
    • C. 30 bar
    • D. 50 bar
      • Discuss
    • 4. Intercooling in compressors results in saving of power in compressing given volume of air to a given pressure.

    • Options
    • A. Correct
    • B. Incorrect
      • Discuss
    • 5. The volumetric efficiency for reciprocating air compressors is about

    • Options
    • A. 10 to 40%
    • B. 40 to 60%
    • C. 60 to 70%
    • D. 70 to 90%
      • Discuss
    • 6. A rotary compressor is driven by an

    • Options
    • A. electric motor
    • B. engine
    • C. either (a) or (b)
    • D. none of these
      • Discuss
    • 7. The maximum combustion pressure in gas turbine is __________ as compared to I.C. engine.

    • Options
    • A. more
    • B. less
      • Discuss
    • 8. The efficiency of a jet engine is higher at

    • Options
    • A. low speeds
    • B. high speeds
    • C. low altitudes
    • D. high altitudes
      • Discuss
    • 9. An open cycle gas turbine works on the same cycle as that of a closed cycle gas turbine.

    • Options
    • A. Yes
    • B. No
      • Discuss
    • 10. The maximum temperature in a gas turbine is

    • Options
    • A. 200°C
    • B. 500°C
    • C. 700°C
    • D. 1000°C
      • Discuss

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