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Compressors, Gas Turbines and Jet Engines

Compressors, Gas Turbines and Jet Engines
More than one stage will be preferred for reciprocating compressor if the delivery pressure is more than

14.7 kg/cm²
6 kg/cm²
2 kg/cm²
10 kg/cm²

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Compressors, Gas Turbines and Jet Engines
The thermal efficiency of a gas turbine as compared to a diesel plant is

More
Less
Same
Depends on other factors

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Compressors, Gas Turbines and Jet Engines
Gas turbines use following type of air compressor

Centrifugal type
Reciprocating type
Lobe type
Axial flow type

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Compressors, Gas Turbines and Jet Engines
The volumetric efficiency of a compressor

Decreases with increase in compression ratio
Increases with increase in compression ratio
Increases with decrease in compression ratio
Decreases with decrease in compression ratio

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Compressors, Gas Turbines and Jet Engines
Mechanical efficiency of gas turbines as compared to I.C engines is

Lower
None of these
Same
Higher

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Compressors, Gas Turbines and Jet Engines
It is not possible to use closed gas turbine cycle in aeronautical engines because

None of these
It requires cooling water for its operation
It is inefficient
It is bulky

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