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Compressors, Gas Turbines and Jet Engines

Compressors, Gas Turbines and Jet Engines
If the flow of air through the compressor is parallel to its axis, then the compressor is

Axial flow compressor
Reciprocating compressor
Centrifugal compressor
Turbo compressor

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Compressors, Gas Turbines and Jet Engines
The efficiency of the vane blower is (where W₁ = Workdone due to compression, and W₂ = Workdone due to back flow)

(W₁ + W₂)/W₂
W₂/(W₁ + W₂)
W₁/(W₁ + W₂)
(W₁ + W₂)/W₁

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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

High
Same
Low
Low/high depending on make and type

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Compressors, Gas Turbines and Jet Engines
A centrifugal compressor works on the principle of

Conversion of pressure energy into kinetic energy
Conversion of kinetic energy into pressure energy
Centripetal action
Generating pressure directly

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Compressors, Gas Turbines and Jet Engines
A closed cycle gas turbine gives ________ efficiency as compared to an open cycle gas turbine.

Higher
Same
None of these
Lower

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Compressors, Gas Turbines and Jet Engines
The hottest point in a gas turbine is

at the tip
in the center
between ~ to i of the blade height
at the base

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