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Compressors, Gas Turbines and Jet Engines

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

Pressure coefficient
Degree of reaction
Work factor
Slip factor

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Compressors, Gas Turbines and Jet Engines
The minimum work required for a three stage reciprocating air compressor is ___ the work required for each stage.

Three times
Six times
Double
Equal to

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

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

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Compressors, Gas Turbines and Jet Engines
A rotary compressor is driven by an

Either (A) or (B)
None of these
Engine
Electric motor

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Compressors, Gas Turbines and Jet Engines
The volumetric efficiency of a compressor

Decreases with decrease in compression ratio
Decreases with increase in compression ratio
Increases with decrease in compression ratio
Increases with increase in compression ratio

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Compressors, Gas Turbines and Jet Engines
The process, which causes the air to enter the impeller blades of a centrifugal compressor at ________ velocity (without effecting the mass of air to flow and velocity of flow) is known as prewhirl.

None of these
Reduced
Increased
Zero

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