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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
Stagnation pressure at the outlet
Pressure ratio
Mass flow rate

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Compressors, Gas Turbines and Jet Engines
The performance of air compressor at high altitudes will be ________ as compared to that at sea level.

None of these
Same
Lower
Higher

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

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

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Compressors, Gas Turbines and Jet Engines
An air compressor may be controlled by

Any one of the above
Throttle control
Blow off control
Clearance control

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Compressors, Gas Turbines and Jet Engines
To avoid moisture troubles, the compressed air main line should

Drop gradually towards the point of use
Be laid vertically
Rise gradually towards the point of use
Be laid exactly horizontally

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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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