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In a single acting reciprocating air compressor, without clearance, the compression of air may be

A. Isothermal

B. Polytropic

C. Isentropic

D. Any one of these

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  1. The mean effective pressure of the compressor is the
  2. The degree of reaction is usually kept ________ for all types of axial flow compressors.
  3. Which of the following statement is correct relating to rocket engines?
  4. For a two stage compressor, if index of compression for higher stage is greater than index of compression…
  5. The compression ratio in a gas turbine is of the order of
  6. The capacity of compressor will be highest when its intake temperature is
  7. Mechanical efficiency of gas turbines as compared to I.C engines is
  8. Volumetric efficiency of a compressor without clearance volume
  9. In turbo fan engine, the jet velocity as compared to turbojet engine is
  10. For perfect intercooling in a three stage compressor
  11. A closed cycle gas turbine works on
  12. The temperature of air at the beginning of the compression stroke is ________ the atmospheric temperature.
  13. The compressor capacity is defined as the
  14. The assumption made in two stage compression with intercooler is that
  15. Maximum work is done in compressing air when the compression is
  16. 1 m of air at atmospheric condition weighs approximately
  17. Diffuser in a compressor is used to
  18. Inter-cooling in multistage compressors is done
  19. Ratio of indicated h.p. to shaft h.p. in known as
  20. There is a certain pressure ratio (optimum) for a gas turbine at which its thermal efficiency is maximum.…
  21. The velocity of air entering in a rocket is ________ as compared to an aircraft.
  22. The ratio of isentropic work to Euler work is known as
  23. Air-fuel ratio in a jet engine will be of the order of
  24. The mass of gas turbine per kW developed is about ________ as that of an I.C. engine.
  25. The degree of reaction in an axial flow compressor is defined as the ratio of static enthalpy rise in…
  26. The ratio of the increase in pressure in rotor blades to total increase in pressure in the stage is…
  27. The efficiency and work ratio of a gas turbine plant can be increased by
  28. The ratio of isentropic work to Eulers work is known as
  29. Ram compression in turbojet involves
  30. A 3 m³/min compressor means that it