The volumetric efficiency for reciprocating air compressors is about

A. 10 to 40 %

B. 40 to 60 %

C. 60 to 70 %

D. 70 to 90 %

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  1. Clearance volume in actual reciprocating compressors is essential
  2. The compression ratio for the compressor is always __________ unity.
  3. The indicated work per unit mass of air delivered is
  4. In a closed cycle gas turbine, the air is compressed
  5. Gas turbine as compared to steam turbine
  6. Fighter bombers use following type of engine
  7. Which of the following statement is wrong?
  8. High air-fuel ratio is used in gas turbines
  9. The thrust of a jet propulsion power unit can be increased by
  10. Rotary compressor is best suited for
  11. Phenomenon of choking in compressor means
  12. With the decrease in compression ratio, the volumetric efficiency
  13. A jet engine works on the principle of conservation of
  14. The efficiency of jet engine is
  15. The thermal efficiency of a simple gas turbine for a given turbine inlet temperature with increase in…
  16. For supplying intermittent small quantity of air at high pressure, following compressor is best suited
  17. The thermodynamic efficiency of rotary compressor is based on
  18. For minimum work in multistage compression, assuming same index of compression in all stages
  19. The reason for volumetric efficiency of reciprocating compressor being less than 100 percent is
  20. The overall thermal efficiency of an ideal gas turbine plant is (where r = Pressure ratio)
  21. In multistage compressor, the isothermal compression is achieved by
  22. Axial flow compressor resembles
  23. Pick up the wrong statement
  24. In a single stage, single acting reciprocating air compressor without clearance volume, the workdone…
  25. In a centrifugal compressor, the ratio of the ________ to the blade velocity is called slip factor.
  26. The ratio of the volume of free air delivery per stroke to the swept volume of the piston, is known…
  27. A rocket engine uses ________ for the combustion of its fuel.
  28. For speed above 3000 km/hour, it is more advantageous to use
  29. In a single acting reciprocating air compressor, without clearance, the compression of air may be
  30. For perfect intercooling in a two stage compressor