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Compressors, Gas Turbines and Jet Engines

Compressors, Gas Turbines and Jet Engines
The volumetric efficiency of a compressor falls roughly as follows for every 100 m increase in elevation

1.0%
0.5%
5%
0.1%

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Compressors, Gas Turbines and Jet Engines
Turbofan engine employs

One air stream
Two or more air streams
No air stream
Solid fuel firing

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Compressors, Gas Turbines and Jet Engines
Surging is the phenomenon of

Air stream blocking the passage
Motion of air at sonic velocity
Air stream not able to follow the blade contour
Unsteady, periodic and reversed flow

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Compressors, Gas Turbines and Jet Engines
The air is delivered ________ in one revolution in case of a three lobbed rotor.

Four times
Six times
Three times
Two times

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

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

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Compressors, Gas Turbines and Jet Engines
A rocket engine for the combustion of its fuel

Does not require oxygen
Carries its own oxygen
Uses surrounding air
Uses compressed atmospheric air

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