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Compressors, Gas Turbines and Jet Engines

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 save fuel
To increase the efficiency

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Compressors, Gas Turbines and Jet Engines
The maximum combustion pressure in gas turbine as compared to I.C. engine is

More
Less
Depends on other factors
Same

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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.

None of these
Higher
Lower
Same

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Compressors, Gas Turbines and Jet Engines
A rocket works with maximum overall efficiency when air craft velocity is equal to the

Jet velocity
Twice the jet velocity
Average of the jet velocity
Half the jet velocity

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Compressors, Gas Turbines and Jet Engines
The inlet pressure is always ___ the discharge pressure.

None of the listed here
Less than
Equal to
More than

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Compressors, Gas Turbines and Jet Engines
The stagnation pressure rise in a centrifugal compressor takes place

In the impeller only
In the diffuser only
In the inlet guide vanes only
In the diffuser and impeller

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