Surging is the phenomenon of

A. Air stream blocking the passage

B. Motion of air at sonic velocity

C. Unsteady, periodic and reversed flow

D. Air stream not able to follow the blade contour

Please do not use chat terms. Example: avoid using "grt" instead of "great".

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  1. Standard air is the air at
  2. The efficiency and work ratio of a gas turbine plant can be increased by
  3. Which is false statement about air receivers?
  4. Pick up the correct statement
  5. The criterion of the thermodynamic efficiency for rotary compressor is
  6. The mass of gas turbine per kW developed is about ________ as that of an I.C. engine.
  7. Rotary compressors are used for delivering
  8. What will be the volume of air at 327°C if its volume at 27°C is 1.5 m³/ mt?
  9. Euler's equation is applicable for
  10. The propulsive power of the rocket is (where v₁ = Jet velocity, and v₂ = Aircraft velocity)
  11. The most efficient method of compressing air is to compress it
  12. The work ratio of simple gas turbine cycle depends on
  13. Choose the correct statement
  14. The minimum work required for a three stage reciprocating air compressor is ________ the work required…
  15. As the turbine inlet temperature increases, the thermal efficiency of gas turbine for the optimum pressure…
  16. Propulsive efficiency is defined as ratio of
  17. The thrust on the rotor in a centrifugal compressor is produced by
  18. After-cooler is used to
  19. In a four stage compressor, if the pressure at the first and third stage is 1 bar and 16 bar, then the…
  20. Ratio of indicated H.P. and brake H.P. is known as
  21. In air breathing jet engine, the jet is formed by expanding
  22. The air is delivered ________ in one revolution in case of a three lobbed rotor.
  23. The overall thermal efficiency of an ideal gas turbine plant is (where r = Pressure ratio)
  24. Euler's equation can be used for
  25. If the clearance ratio for a reciprocating air compressor is 'K', then its volumetric efficiency is…
  26. The maximum combustion pressure in gas turbine as compared to I.C. engine is
  27. With the decrease in compression ratio, the volumetric efficiency
  28. If p₁ is the pressure of air entering the L.P, cylinder and p₃ is the pressure of air…
  29. The overall isothermal efficiency of the compressor is defined as the ratio of
  30. The maximum temperature in a gas turbine is