The pressure of air at the beginning of the compression stroke is ________ the atmospheric pressure.

A. Equal to

B. Less than

C. More than

D. None of these

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  1. The efficiency of roots blower ________ with the increase in pressure ratio.
  2. In a single acting reciprocating compressor, the suction, compression and delivery of air takes place…
  3. Adiabatic compression is one in which
  4. Turbofan engine employs
  5. The performance of air compressor at high altitudes will be ________ as compared to that at sea level.
  6. Mechanical efficiency of gas turbines as compared to I.C engines is
  7. There is a certain pressure ratio (optimum) for a gas turbine at which its thermal efficiency is maximum.…
  8. The pressure ratio of an ideal vaned compressor with increase in mass flow rate
  9. A jet engine works on the principle of conservation of
  10. Water is injected in gas turbine cycle to
  11. The air entry velocity m a rocket as compared to aircraft is
  12. The overall thermal efficiency of an ideal gas turbine plant is (where r = Pressure ratio)
  13. Surging is the phenomenon of
  14. The velocity of air entering in a rocket is ________ as compared to an aircraft.
  15. A centrifugal compressor works on the principle of
  16. In jet engines, for the efficient production of large power, fuel is burnt in an atmosphere of
  17. Maximum delivery pressure is a rotary air compressor is of the order of
  18. The advantage of multistage compression over single stage compression is
  19. For a two stage compressor, if index of compression for higher stage is greater than index of compression…
  20. If V, U and Vr represent the absolute velocity of fluid, velocity of blade, and relative velocity of…
  21. The fuel consumption in gas turbines is accounted for by
  22. Losses in a centrifugal compressor are due to
  23. Rotary compressors are suitable for
  24. Volumetric efficiency of a compressor without clearance volume
  25. High air-fuel ratio is used in gas turbines
  26. Which of the following statement is correct?
  27. Pick up the false statement
  28. The ratio of isentropic work to Euler work is known as
  29. Pick up the correct statement
  30. The intercooler pressure, for minimum work required, for a two stage reciprocating air compressor, is…