Compressors, Gas Turbines and Jet Engines
Which of the following statement is correct relating to rocket engines?

All of these
The combustion chamber in a rocket engine is directly analogous to the reservoir of a supersonic wind tunnel
The exit velocities of exhaust gases are much higher than those in jet engine
The stagnation conditions exist at the combustion chamber

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Compressors, Gas Turbines and Jet Engines
An ideal air compressor cycle without clearance on P-V diagram can be represented by following processes

Two adiabatic and two isobaric
Two adiabatic, one isobaric and one constant volume
One adiabatic, one isobaric and two constant volumes
One adiabatic, two isobaric, and one constant volume

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