Compressors, Gas Turbines and Jet Engines
The work ratio of a gas turbine plant is defined as the ratio of

Actual heat drop and isentropic heat drop
Net work output and work done by turbine
Net work output and isentropic heat drop
Net work output and heat supplied

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Compressors, Gas Turbines and Jet Engines
The overall efficiency of the compressed air system is the

None of these
Ratio of shaft input to the compressor to the shaft output of air motor
Ratio of shaft output of the air motor to the shaft input to the compressor
Product of shaft output of air motor and shaft input to the compressor

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

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

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