A rocket works with maximum overall efficiency when air craft velocity is equal to the

A. Jet velocity

B. Twice the jet velocity

C. Half the jet velocity

D. Average of the jet velocity

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  1. In air breathing jet engine, the jet is formed by expanding
  2. A machine used to raise the pressure of air is called
  3. The pressure and temperature conditions of air at the suction of compressor are
  4. The overall efficiency of the compressed air system is the
  5. If p₁, is the pressure of air entering the L.P. cylinder and p₂ is the pressure of air…
  6. In a turbo jet engine, subsequent to heat addition to compressed air, to get the power output, the working…
  7. The criterion of the thermodynamic efficiency for rotary compressor is
  8. 1 m of air at atmospheric condition weighs approximately
  9. The compression ratio for the compressor is always __________ unity.
  10. A compressor at high altitude will draw
  11. The efficiency of roots blower ________ with the increase in pressure ratio.
  12. Reheating in a multistage expansion gas turbine __________ compressor work.
  13. In gas turbines, high thermal efficiency is obtained in
  14. If the clearance ratio for a reciprocating air compressor is 'K', then its volumetric efficiency is…
  15. Ratio of compression is the ratio of
  16. Water gas is produced by
  17. For perfect intercooling in a two stage compressor
  18. In a double acting compressor, the air is compressed
  19. Temperature of gases at end of compression as compared to exhaust gases in a gas turbine is
  20. The degree of reaction in an axial flow compressor is defined as the ratio of static enthalpy rise in…
  21. The most efficient method of compressing air is to compress it
  22. Adiabatic compression is one in which
  23. The ratio of isentropic work to Eulers work is known as
  24. Rotary compressor is best suited for
  25. Pressure ratio in gas turbines is the ratio of
  26. In the aircraft propellers
  27. The reason for volumetric efficiency of reciprocating compressor being less than 100 percent is
  28. The compressor efficiency is the
  29. In axial flow compressor, exit flow angle deviation from the blade angle is a function of
  30. The efficiency of the vane blower is (where W₁ = Workdone due to compression, and W₂ =…