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Compressors, Gas Turbines and Jet Engines

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
The ratio of isentropic work to Euler work is known as

Polytropic reaction
Pressure coefficient
Work coefficient
Slip factor

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Compressors, Gas Turbines and Jet Engines
In a high pressure compressor, the delivery pressure is

8 to 10 bar
5 to 8 bar
10 to 15 bar
1 to 5 bar

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Compressors, Gas Turbines and Jet Engines
Diffuser in a compressor is used to

Convert pressure energy into kinetic energy
Convert kinetic energy into pressure energy
Increase velocity
Make the flow streamline

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Compressors, Gas Turbines and Jet Engines
The compression ratio for the compressor is always _________ unity.

Less than
None of these
Equal to
More than

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Compressors, Gas Turbines and Jet Engines
The pressure of air at the beginning of the compression stroke is ___ the atmospheric pressure.

None of the listed here
More than
Equal to
Less than

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