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Standard air is the air at ________ and relative humidity of 36 percent.

A. 0.1 bar and 20°C

B. 1 bar and 20°C

C. 0.1 bar and 40°C

D. 1 bar and 40°C

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  1. In a centrifugal compressor, the highest Mach number leading to shock wave in the fluid flow occurs…
  2. The criterion of the thermodynamic efficiency for rotary compressor is
  3. In a four stage compressor, if the pressure at the first and third stage is 1 bar and 16 bar, then the…
  4. Turbofan engine employs
  5. The performance of air compressor at high altitudes will be ________ as compared to that at sea level.
  6. A rocket works with maximum overall efficiency when air craft velocity is equal to the
  7. Ramjet engine
  8. A turboprop is preferred to turbojet because
  9. 1 m of air at atmospheric condition weighs approximately
  10. What will be the volume of air at 327°C if its volume at 27°C is 1.5 m³/ mt?
  11. Pick up the wrong statement
  12. The fuel consumption in gas turbines is accounted for by
  13. In n₁ and n₂ are the indices of compression for the first and second stage of compression,…
  14. The degree of reaction in an axial flow compressor is defined as the ratio of static enthalpy rise in…
  15. As the turbine inlet temperature increases, the thermal efficiency of gas turbine for the optimum pressure…
  16. The material commonly used for air craft gas turbine is
  17. Water is injected in gas turbine cycle to
  18. A large clearance volume in a reciprocating compressor results in
  19. The indicated work per unit mass of air delivered is
  20. The degree of reaction is usually kept ________ for all types of axial flow compressors.
  21. The compression ratio for the compressor is always __________ unity.
  22. The efficiency of jet engine is
  23. High air-fuel ratio in gas turbines
  24. In turbo fan engine, the jet velocity as compared to turbojet engine is
  25. The effective power of gas turbines is increased by adding the following in compressor
  26. Standard air is the air at
  27. Pick up wrong statement. Surging phenomenon in centrifugal compressor depends on
  28. Propulsive efficiency is defined as ratio of
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  30. Cylinder clearance in a compressor should be