Volumetric efficiency of air compressors is of the order of

A. 20 - 30 %

B. 40 - 50 %

C. 60 - 70 %

D. 70 - 90 %

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  1. Work ratio of a gas turbine may be improved by
  2. The mass of gas turbine per kW developed is about ________ as that of an I.C. engine.
  3. The overall isothermal efficiency of compressor is defined as the ratio of
  4. For an irreversible gas turbine cycle, the efficiency and work ratio both depend on
  5. The intercooler pressure, for minimum work required, for a two stage reciprocating air compressor, is…
  6. Diffuser in a compressor is used to
  7. For a two stage compressor, if index of compression for higher stage is greater than index of compression…
  8. The work ratio of a gas turbine plant is defined as the ratio of
  9. The ratio of specific weight/h.p. of gas turbine and I.C engines may be typically of the order of
  10. Rotary compressor is best suited for
  11. For supplying intermittent small quantity of air at high pressure, following compressor is best suited
  12. An air compressor may be controlled by
  13. In a centrifugal compressor, the highest Mach number leading to shock wave in the fluid flow occurs…
  14. The inlet pressure is always ________ the discharge pressure.
  15. Stalling of blades in axial flow compressor is the phenomenon of
  16. Gas turbines for power generation are normally used
  17. The type of rotary compressor used in aeroplanes, is of
  18. A rocket works with maximum overall efficiency when air craft velocity is equal to the
  19. The pressure ratio of an ideal vaned compressor with increase in mass flow rate
  20. Only rocket engines can be propelled to space because
  21. The working fluid in a turbine is
  22. Which is false statement about air receivers?
  23. The specific output per kg mass flow rate of a gas turbine (having fixed efficiencies of compressor…
  24. The blades of gas turbine are made of
  25. The weight per horse power ratio for gas in Turbine as compared to I.C. engine and steam turbine is
  26. Free air is the air at
  27. The compressor efficiency is the
  28. Inter-cooling in gas turbine results in
  29. The thermal efficiency of a simple gas turbine for a given turbine inlet temperature with increase in…
  30. The ratio of the increase in pressure in rotor blades to total increase in pressure in the stage is…