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Compressors, Gas Turbines and Jet Engines

Compressors, Gas Turbines and Jet Engines
A machine used to raise the pressure of air is called

Compressor
Gas turbine
Air motor
I.C engine

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Compressors, Gas Turbines and Jet Engines
The process, which causes the air to enter the impeller blades of a centrifugal compressor at ________ velocity (without effecting the mass of air to flow and velocity of flow) is known as prewhirl.

Increased
Zero
Reduced
None of these

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Compressors, Gas Turbines and Jet Engines
The axial flow compressor is preferred in aircraft gas turbines because of

None of the listed here
Low frontal area
High pressure rise
Higher thrust

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

Timken, Haste alloys
High alloy steel
Duralumin
Stainless 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
The ratio of work-done per cycle to the stroke volume of the compressor is known as

Compressor efficiency
Compressor capacity
Compression ratio
Mean effective pressure

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