Compressors, Gas Turbines and Jet Engines
The pressure and temperature conditions of air at the suction of compressor are

Slightly less than atmospheric
Pressure slightly less than atmospheric and temperature slightly more than atmospheric
Atmospheric
Slightly more than atmospheric

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Compressors, Gas Turbines and Jet Engines
Water gas is produced by

Carbonisation of coal
Partial combustion of coal, eke, anthracite coal or charcoal in a mixed air steam blast
Passing steam over incandescent coke
Passing air and a large amount of steam over waste coal at about 65°C

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Compressors, Gas Turbines and Jet Engines
Volumetric efficiency of a compressor without clearance volume

Increases with increase in compression ratio
May increase/decrease depending on compressor capacity
Is not dependent upon compression ratio
Decreases with increase in compression ratio

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