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Compressors, Gas Turbines and Jet Engines

Compressors, Gas Turbines and Jet Engines
A closed gas turbine in which fuel is burnt directly in the air is not possible because of

High specific volume
High friction losses
Paucity of O2
Increasing gas temperature

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

Compressed atmospheric air
Surrounding air
Its own oxygen
None of these

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Compressors, Gas Turbines and Jet Engines
The gas in cooling chamber of a closed cycle gas turbine is cooled at

None of the listed here
Constant temperature
Constant pressure
Constant volume

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Compressors, Gas Turbines and Jet Engines
High air-fuel ratio is used in gas turbines

To increase the output
To reduce the exit temperature
To increase the efficiency
To save fuel

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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 maximum during

None of these
Isothermal compression
Polytropic compression
Isentropic compression

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Compressors, Gas Turbines and Jet Engines
Which is false statement about multistage compression?

Volumetric efficiency is high
The moisture in air is condensed in the inter-cooler
It is best suited for compression ratios around 7:1
Power consumption per unit of air delivered is low

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