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Compressors, Gas Turbines and Jet Engines

Compressors, Gas Turbines and Jet Engines
The type of rotary compressor used in aeroplanes, is of

Radial flow type
None of these
Centrifugal type
Axial flow type

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Compressors, Gas Turbines and Jet Engines
In a single stage, single acting reciprocating air compressor, without clearance, the work-done on the air during isentropic compression is ________ the heat required to raise the temperature of air from T₁ to T₂ at a constant pressure.

Less than
Equal to
None of these
Greater than

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Compressors, Gas Turbines and Jet Engines
A closed cycle gas turbine gives ________ efficiency as compared to an open cycle gas turbine.

Same
Lower
None of these
Higher

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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
In a jet engine, the air-fuel ratio is

2.0840277777778
2.5006944444444
1.2506944444444
1.6673611111111

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Compressors, Gas Turbines and Jet Engines
Pressure ratio in gas turbines is the ratio of

Highest pressure to exhaust pressure
Inlet pressure to exhaust pressure
Pressures across the turbine
Compressor pressure ratio

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