Compressors, Gas Turbines and Jet Engines
Which of the following statement is correct as regard to centrifugal compressors?

The maximum efficiency is higher than multistage axial flow compressors
The static pressure of air in the impeller increases in order to provide centripetal force on the air
The flow of air is parallel to the axis of the compressor
The impeller rotates at high speeds

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

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
All of these
The stagnation conditions exist at the combustion chamber

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