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Compressors, Gas Turbines and Jet Engines

Compressors, Gas Turbines and Jet Engines
Maximum delivery pressure is a rotary air compressor is of the order of

10 kg/cm²
16 kg/cm²
25 kg/cm²
6 kg/cm²

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Compressors, Gas Turbines and Jet Engines
In a single stage, single acting reciprocating air compressor without clearance volume, the work-done is maximum during

Isentropic compression
None of these
Isothermal compression
Polytropic compression

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

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

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

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

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Compressors, Gas Turbines and Jet Engines
The reason for volumetric efficiency of reciprocating compressor being less than 100 percent is

Superheating in compressor
All of these
Clearance volume and leakages
Pressure drop across the valves

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Compressors, Gas Turbines and Jet Engines
The advantage of multistage compression over single stage compression is

Higher volumetric efficiency
All of these
Lower power consumption per unit of air delivered
Decreased discharge temperature

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