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Compressors, Gas Turbines and Jet Engines

Compressors, Gas Turbines and Jet Engines
The maximum delivery pressure in a rotary air compressor is

30 bar
50 bar
20 bar
10 bar

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Compressors, Gas Turbines and Jet Engines
In gas turbines, high thermal efficiency is obtained in

Closed cycle & Open cycle
Closed cycle
Closed/open depending on other considerations
Open cycle

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Compressors, Gas Turbines and Jet Engines
Volumetric efficiency of air compressors is of the order of

70 - 90%
20 - 30%
60 - 70%
40 - 50%

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Compressors, Gas Turbines and Jet Engines
The pressure ratio for an open cycle gas turbine compared to closed cycle gas turbine of same h.p. is

Same
Low
Low/high depending on make and type
High

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Compressors, Gas Turbines and Jet Engines
In turbo fan engine, the jet velocity as compared to turbojet engine is

Same
Less
More
May be less or more depending upon speed

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Compressors, Gas Turbines and Jet Engines
Ratio of indicated h.p. to shaft h.p. in known as

Volumetric efficiency
Compressor efficiency
Mechanical efficiency
Isothermal efficiency

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MORE MCQ ON Compressors, Gas Turbines and Jet Engines

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