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Compressors, Gas Turbines and Jet Engines

Compressors, Gas Turbines and Jet Engines
Volumetric efficiency of a compressor decreases with ________ in compression ratio.

Does not change
Increase
Decrease
Remain same

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Compressors, Gas Turbines and Jet Engines
Ramjet engine

Requires no air for its operation
Is self operating at zero flight speed
Is not self operating at zero flight speed
Produces a jet consisting of plasma

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Compressors, Gas Turbines and Jet Engines
It is not possible to use closed gas turbine cycle in aeronautical engines because

None of these
It is inefficient
It requires cooling water for its operation
It is bulky

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

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

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Compressors, Gas Turbines and Jet Engines
For supplying intermittent small quantity of air at high pressure, following compressor is best suited

Centrifugal
Screw
Axial
Reciprocating

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Compressors, Gas Turbines and Jet Engines
A jet engine works on the principle of conservation of

Energy
Flow
Mass
Linear momentum

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