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Compressors, Gas Turbines and Jet Engines

Compressors, Gas Turbines and Jet Engines
A gas turbine used in air craft should have

Small frontal area and high h.p.
High speed and high h.p.
High h.p. and low weight
Low weight and small frontal area

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Compressors, Gas Turbines and Jet Engines
The volume of air sucked by the compressor during its suction stroke is called

Swept volume
Compressor capacity
Free air delivery
None of these

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Compressors, Gas Turbines and Jet Engines
The gas in cooling chamber of a closed cycle gas turbine is cooled at

None of the listed here
Constant pressure
Constant temperature
Constant volume

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

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

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Compressors, Gas Turbines and Jet Engines
Propulsion efficiency of the following order is obtained in practice

0.34
0.5
0.6
0.72

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Compressors, Gas Turbines and Jet Engines
Isothermal compression efficiency, even when running at high speed, can be approached by using

Both (A) and (B) above
Cold water spray
Fully insulating the cylinder
Multistage compression

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