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Compressors, Gas Turbines and Jet Engines

Compressors, Gas Turbines and Jet Engines
In a centrifugal compressor, the flow of air is ________ to the axis of compressor.

Inclined
Perpendicular
None of these
Parallel

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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
Degree of reaction
Pressure coefficient
Pressure ratio

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Compressors, Gas Turbines and Jet Engines
The inter-cooler pressure, for minimum work required, for a two stage reciprocating air compressor, is given by (where p₁ = Intake pressure of air, p₂ = Inter-cooler pressure, and p₃ = Delivery pressure of air)

p₂ = p₃/p₁
p₂ = p₁ × p₂
p₂ = p₁ × p₃
p₂ = p₁/p₃

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Compressors, Gas Turbines and Jet Engines
A closed cycle gas turbine works on

Carnot cycle
Ericsson cycle
Joule cycle
Rankine cycle

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Compressors, Gas Turbines and Jet Engines
The efficiency and work ratio of a gas turbine plant can be increased by

Adding heat exchanger
Injecting water in/around combustion chamber
All of these
Reheating the air after partial expansion in the turbine

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

5%
0.5%
1.0%
0.1%

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