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Compressors, Gas Turbines and Jet Engines

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

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

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Compressors, Gas Turbines and Jet Engines
The ratio of the increase in pressure in rotor blades to total increase in pressure in the stage is called

Slip factor
Pressure coefficient
Degree of reaction
Pressure ratio

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Compressors, Gas Turbines and Jet Engines
Work ratio of a gas turbine plant is ratio of

Net work output and work done by turbine
Work done by turbine and net work output
Work done by turbine and heat supplied
Net work output and heat supplied

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Compressors, Gas Turbines and Jet Engines
Stalling of blades in axial flow compressor is the phenomenon of

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

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Compressors, Gas Turbines and Jet Engines
The overall thermal efficiency of an ideal gas turbine plant is (where r = Pressure ratio)

r ɣ-1
1 - (1/r) ɣ/ɣ-1
1 - r ɣ-1
1 - (1/r) ɣ-1/ɣ

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Compressors, Gas Turbines and Jet Engines
Gas turbines use following type of air compressor

Lobe type
Axial flow type
Reciprocating type
Centrifugal type

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MORE MCQ ON Compressors, Gas Turbines and Jet Engines

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