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The air entry velocity m a rocket as compared to aircraft is

A. Same

B. More

C. Less

D. Zero

Correct Answer : D.


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  1. A closed gas turbine in which fuel is burnt directly in the air is not possible because of
  2. Only rocket engines can be propelled to space because
  3. Reheating in gas turbine results in
  4. Maximum work is done in compressing air when the compression is
  5. A closed cycle gas turbine consists of a
  6. The net work input required for compressor with increase in clearance volume
  7. The ratio of work done per cycle to the swept volume in case of compressor is called
  8. Which of the following statement is correct relating to rocket engines?
  9. When the outlet angle from the rotor of a centrifugal compressor is more than 90°, then the blades…
  10. Water gas is produced by
  11. A compressor at high altitude will draw
  12. The effective power of gas turbines is increased by adding the following in compressor
  13. The pressure of air at the beginning of the compression stroke is ________ the atmospheric pressure.
  14. The thermal efficiency of a gas turbine as compared to a diesel plant is
  15. The pressure ratio of an ideal vaned compressor with increase in mass flow rate
  16. The material commonly used for air craft gas turbine is
  17. Fighter bombers use following type of engine
  18. The ratio of workdone per cycle to the stroke volume of the compressor is known as
  19. Rotary compressor is best suited for
  20. Ratio of indicated h.p. to shaft h.p. in known as
  21. The overall efficiency of the compressed air system is the
  22. If infinite number of heaters be used in a gas turbine, then expansion process in turbine approaches
  23. The ratio of the net work obtained from the gas turbine plant to the turbine work is known as
  24. The criterion of the thermodynamic efficiency for rotary compressor is
  25. During base load operation, the best method of controlling compressor is
  26. Diffuser in a compressor is used to
  27. The process, which causes the air to enter the impeller blades of a centrifugal compressor at ________…
  28. The pressure and temperature conditions of air at the suction of compressor are
  29. A jet engine has
  30. Gas turbine as compared to steam turbine