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The material commonly used for air craft gas turbine is

A. Stainless steel

B. High alloy steel

C. Duralumin

D. Timken, Haste alloys

Correct Answer : D.


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  1. Phenomenon of choking in compressor means
  2. If the flow of air through the compressor is parallel to its axis, then the compressor is
  3. The efficiency of jet engine is
  4. Choose the correct statement
  5. For perfect intercooling in a three stage compressor
  6. The work ratio of simple gas turbine cycle depends on
  7. In a four stage compressor, if the pressure at the first and third stage is 1 bar and 16 bar, then the…
  8. Ramjet engine
  9. Volumetric efficiency of a compressor with clearance volume
  10. Which of the following statement is wrong?
  11. The ratio of the discharge pressure to the inlet pressure of air is called
  12. In a jet propulsion unit, the products of combustion after passing through the gas turbine are discharged…
  13. The compression ratio for the compressor is always __________ unity.
  14. A rocket engine uses ________ for the combustion of its fuel.
  15. In a single acting reciprocating air compressor, without clearance, the compression of air may be
  16. Pick up the correct statement
  17. When air is to be compressed at a high pressure, then it is advantageous to use
  18. A closed cycle gas turbine works on
  19. Gas turbine blades are given a rake
  20. In a single acting reciprocating compressor, the suction, compression and delivery of air takes place…
  21. The degree of reaction of an axial flow turbine is the ratio of isentropic temperature drop in a blade…
  22. The net work input required for compressor with increase in clearance volume
  23. High air-fuel ratio is used in gas turbines
  24. The ratio of the increase in pressure in rotor blades to total increase in pressure in the stage is…
  25. Mechanical efficiency of gas turbines as compared to I.C engines is
  26. The thrust on the rotor in a centrifugal compressor is produced by
  27. Work ratio of a gas turbine plant is ratio of
  28. In a centrifugal compressor, the flow of air is ________ to the axis of compressor.
  29. The ideal efficiency of simple gas turbine cycle depends on
  30. Pick up the wrong statement