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Compressors, Gas Turbines and Jet Engines

Compressors, Gas Turbines and Jet Engines
Pick up wrong statement. Surging phenomenon in centrifugal compressor depends on

Change in load
Pressure ratio
Stagnation pressure at the outlet
Mass flow rate

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

Parallel
Perpendicular
Inclined
None of these

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Compressors, Gas Turbines and Jet Engines
Isothermal compression efficiency, even when running at high speed, can be approached by using

Fully insulating the cylinder
Multistage compression
Cold water spray
Both (A) and (B) above

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

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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
Equal to
Six times
Double

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Compressors, Gas Turbines and Jet Engines
Cylinder clearance in a compressor should be

As small as possible
About 100% of swept volume
As large as possible
About 50% of swept volume

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