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

  • The ratio of the volume of free air delivery per stroke to the swept volume of the piston, is known as


  • Options
  • A. compressor efficiency
  • B. volumetric efficiency
  • C. isothermal efficiency
  • D. mechanical efficiency

  • Correct Answer
  • volumetric efficiency 

    • Compressors, Gas Dynamics and Gas Turbines problems

    Search Results

    • 1. The rotary compressors are suitable for large discharge of air at low pressure.

    • Options
    • A. True
    • B. False
      • Discuss
    • 2. Intercooling in gas turbines

    • Options
    • A. decreases net output but increases thermal efficiency
    • B. increases net output but decreases thermal efficiency
    • C. decreases net output and thermal efficiency both
    • D. increases net output and thermal efficiency both
      • Discuss
    • 3. A large clearance Volume in a reciprocating compressor results in

    • Options
    • A. reduced volume flow rate
    • B. increased volume flow rate
    • C. lower suction pressure
    • D. lower delivery pressure
      • Discuss
    • 4. An axial compressor gives optimum performance at high speeds and large volume flows.

    • Options
    • A. Agree
    • B. Disagree
      • Discuss
    • 5. The capacity of a compressor is expressed in

    • Options
    • A. kg/m2
    • B. kg/m3
    • C. m3/min
    • D. m3/kg
      • Discuss
    • 6. The heat transfer by conduction through a thick sphere is given by

    • Options
    • A.
    • B.
    • C.
    • D.
      • Discuss
    • 7. The wet bulb temperature during sensible heating of air

    • Options
    • A. remains constant
    • B. increases
    • C. decreases
      • Discuss
    • 8. During sensible cooling of air __________ decreases.

    • Options
    • A. wet bulb temperature
    • B. relative humidity
    • C. dry bulb temperature
    • D. specific humidity
      • Discuss
    • 9. The relative humidity decreases as air gets wet.

    • Options
    • A. True
    • B. False
      • Discuss
    • 10. An electrolux refrigerator is called a __________ absorption system.

    • Options
    • A. single fluid
    • B. two fluids
    • C. three fluids
      • Discuss

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