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Compressors, Gas Turbines and Jet Engines

Compressors, Gas Turbines and Jet Engines
The ratio of work-done per cycle to the stroke volume of the compressor is known as

Compressor capacity
Mean effective pressure
Compressor efficiency
Compression ratio

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Compressors, Gas Turbines and Jet Engines
In a single stage, single acting reciprocating air compressor, without clearance, the work-done on the air during isentropic compression is ________ the heat required to raise the temperature of air from T₁ to T₂ at a constant pressure.

Greater than
Equal to
None of these
Less than

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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
None of these
Reduced
Zero

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Compressors, Gas Turbines and Jet Engines
The pressure ratio in gas turbines is of the order of

0.37569444444444
2.5423611111111
0.084027777777778
0.16736111111111

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Compressors, Gas Turbines and Jet Engines
The maximum propulsion efficiency of a turbojet is attained at around following speed

550 km/hr
2400 km/hr
1700 km/hr
1050 km/hr

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Compressors, Gas Turbines and Jet Engines
Temperature of gases at end of compression as compared to exhaust gases in a gas turbine is

Higher
Equal
Lower
Can't be compared

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