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Diffuser in a compressor is used to

A. Increase velocity

B. Make the flow streamline

C. Convert pressure energy into kinetic energy

D. Convert kinetic energy into pressure energy

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  1. Pick up the correct statement
  2. The overall efficiency of the compressed air system is the
  3. The velocity of air entering in a rocket is ________ as compared to an aircraft.
  4. In air breathing jet engine, the jet is formed by expanding
  5. In an axial flow compressor, the ratio of pressure in the rotor blades to the pressure rise in the compressor…
  6. Volumetric efficiency of a compressor decreases with ________ in compression ratio.
  7. Rotary compressors are suitable for
  8. Reciprocating air compressor is best suited for
  9. There is a certain pressure ratio (optimum) for a gas turbine at which its thermal efficiency is maximum.…
  10. If the flow of air through the compressor is parallel to its axis, then the compressor is
  11. A rocket works with maximum overall efficiency when air craft velocity is equal to the
  12. The propulsive power of the rocket is (where v₁ = Jet velocity, and v₂ = Aircraft velocity)
  13. Ratio of indicated h.p. to shaft h.p. in known as
  14. The maximum delivery pressure in a rotary air compressor is
  15. The work ratio of simple gas turbine cycle depends on
  16. In a centrifugal compressor, the flow of air is ________ to the axis of compressor.
  17. The following property is most important for material used for gas turbine blade
  18. The compressor efficiency is the
  19. If the clearance ratio for a reciprocating air compressor is 'K', then its volumetric efficiency is…
  20. The efficiency of a jet engine is higher at
  21. Reheating in a gas turbine
  22. Volumetric efficiency of air compressors is of the order of
  23. Which of the following statement is correct relating to rocket engines?
  24. Which of the following statement is correct as regard to centrifugal compressors?
  25. Air-fuel ratio in a jet engine will be of the order of
  26. Separators in compressor installations are located
  27. The most efficient method of compressing air is to compress it
  28. The efficiency of the vane blower is (where W₁ = Workdone due to compression, and W₂ =…
  29. In air compressors, free air delivery means the
  30. The thrust on the rotor in a centrifugal compressor is produced by