Compressors, Gas Turbines and Jet Engines
Clearance volume in actual reciprocating compressors is essential

To attain high volumetric efficiency
To provide cushioning effect
To provide cushioning effect and also to avoid mechanical bang of piston with cylinder head
To accommodate Valves in the cylinder head

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Compressors, Gas Turbines and Jet Engines
Pick up the correct statement

Gas turbines use both air and liquid cooling
Gas turbine's blade will appear as impulse section at the hub and as a reaction section at tip
Large gas turbines use radial inflow turbines
Gas turbines have their blades similar to steam turbine

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

Product of shaft output of air motor and shaft input to the compressor
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

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