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Compressors, Gas Turbines and Jet Engines

Compressors, Gas Turbines and Jet Engines
If the flow of air through the compressor is parallel to its axis, then the compressor is

Reciprocating compressor
Centrifugal compressor
Axial flow compressor
Turbo compressor

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Compressors, Gas Turbines and Jet Engines
Isothermal compression though most efficient, but is not practicable because

Compressor has to run at very slow speed to achieve it
It does not increase pressure much
It is impossible in practice
It requires very big cylinder

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Compressors, Gas Turbines and Jet Engines
The maximum delivery pressure in a rotary air compressor is

50 bar
20 bar
10 bar
30 bar

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Compressors, Gas Turbines and Jet Engines
The ratio of the net work obtained from the gas turbine plant to the turbine work is known as

Pressure ratio
None of these
Work ratio
Compression ratio

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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 minimum during

Polytropic compression
None of these
Isothermal compression
Isentropic compression

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

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