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COMPRESSORS, GAS TURBINES AND JET ENGINES

Compressors, Gas Turbines and Jet Engines
In a closed cycle gas turbine, the air is compressed

Polytropically
Isentropically
None of these
Isothermally

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Compressors, Gas Turbines and Jet Engines
In a double acting compressor, the air is compressed

In two cylinders
In two cylinders on both sides of the piston
In one cylinder
In a single cylinder on both sides of the piston

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Compressors, Gas Turbines and Jet Engines
The work-done on a compressor will be minimum if air is taken from

A source of low temperature air
A source at 0° C
The atmosphere
A source of high temperature air

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Compressors, Gas Turbines and Jet Engines
Free air is the air at

0°C and standard atmospheric conditions
20°C and 1 kg/cm² and relative humidity of 36%
Atmospheric conditions at any specific location
15°C and 1 kg/cm²

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Compressors, Gas Turbines and Jet Engines
Standard air is the air at

20°C and 1 kg/cm² and relative humidity 36%
15°C and 1 kg/cm²
Atmospheric conditions at any specific location
0°C and standard atmospheric conditions

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