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Compressors, Gas Turbines and Jet Engines

Compressors, Gas Turbines and Jet Engines
In a single acting reciprocating air compressor, without clearance, the compression of air may be

Any one of these
Isothermal
Isentropic
Polytropic

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Compressors, Gas Turbines and Jet Engines
The material commonly used for air craft gas turbine is

Timken, Haste alloys
Stainless steel
Duralumin
High alloy steel

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Compressors, Gas Turbines and Jet Engines
1 m of air at atmospheric condition weighs approximately

2.2 kg
0.5 kg
1.3 kg
1.0 kg

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Compressors, Gas Turbines and Jet Engines
The effective power of gas turbines is increased by adding the following in compressor

Nitrogen
Carbon dioxide
Ammonia and water vapour
Hydrogen

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Compressors, Gas Turbines and Jet Engines
A rocket engine uses __________ for the combustion of its fuel.

None of these
Compressed atmospheric air
Its own oxygen
Surrounding air

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Compressors, Gas Turbines and Jet Engines
Volumetric efficiency of air compressors is of the order of

60 - 70%
20 - 30%
40 - 50%
70 - 90%

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