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Compressors, Gas Turbines and Jet Engines

Compressors, Gas Turbines and Jet Engines
Standard air is the air at ___ and relative humidity of 36 percent.

0.1 bar and 40°C
1 bar and 20°C
0.1 bar and 20°C
1 bar and 40°C

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Compressors, Gas Turbines and Jet Engines
In an axial flow compressor, the ratio of pressure in the rotor blades to the pressure rise in the compressor in one stage is known as

Work factor
Degree of reaction
Pressure coefficient
Slip factor

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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

Screw
Axial
Centrifugal
Reciprocating

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Compressors, Gas Turbines and Jet Engines
The ratio of outlet whirl velocity to blade velocity in case of centrifugal compressor is called

Velocity factor
Slip factor
None of these
Velocity coefficient

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

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