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Compressors, Gas Turbines and Jet Engines

Compressors, Gas Turbines and Jet Engines
Losses in a centrifugal compressor are due to

Inlet losses
Diffuser losses
Impeller channel losses
All of the listed here

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Compressors, Gas Turbines and Jet Engines
Volumetric efficiency is

The ratio of the air actually delivered to the amount of piston displacement
Reciprocal of compression ratio
The ratio of stroke volume to clearance volume
Index of compressor performance

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

Timken, Haste alloys
Stainless steel
High alloy steel
Duralumin

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Compressors, Gas Turbines and Jet Engines
Separators are generally used in air compressor installations

After the inter-cooler
Before the inter-cooler
Before first stage suction
Between the after-cooler and receiver

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

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

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MORE MCQ ON Compressors, Gas Turbines and Jet Engines

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