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Compressors, Gas Turbines and Jet Engines

Compressors, Gas Turbines and Jet Engines
Water is injected in gas turbine cycle to

Control output of turbine
Control fire hazards
Increase efficiency
Control temperature

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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
The volume of air delivered by the compressor is called

Free air delivery
Swept volume
None of the listed here
Compressor capacity

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Compressors, Gas Turbines and Jet Engines
Inter-cooling in multistage compressors is done

To cool the air at delivery
To minimize the work of compression
To enable compression in two stages
To cool the air during compression

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Compressors, Gas Turbines and Jet Engines
If the clearance ratio for a reciprocating air compressor is 'K', then its volumetric efficiency is given by

1 + k - k (p₂/p₁) n-1/n
1 + k - k (p₂/p₁)1/n
1 - k + k (p₁/p₂)1/n
1 - k + k (p₁/p₂) n- 1/n

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Compressors, Gas Turbines and Jet Engines
The capacity of a compressor is expressed in

m³/min
m³/kg
kg/m³
kg/m²

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