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Compressors, Gas Turbines and Jet Engines

Compressors, Gas Turbines and Jet Engines
During peak load periods, the best method of controlling compressors is

Start-stop motor
Relief valve
Variable speed
Constant speed unloader

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Compressors, Gas Turbines and Jet Engines
The type of rotary compressor used in aeroplanes, is of

Radial flow type
Axial flow type
None of these
Centrifugal type

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Compressors, Gas Turbines and Jet Engines
In the aircraft propellers

The propulsive matter is caused to flow around the propelled body
All of these
Propulsive matter is ejected from within the propelled body
Its functioning does not depend on presence of air

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Compressors, Gas Turbines and Jet Engines
The reason for volumetric efficiency of reciprocating compressor being less than 100 percent is

Clearance volume and leakages
All of these
Pressure drop across the valves
Superheating in compressor

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

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

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Compressors, Gas Turbines and Jet Engines
For slow speed large capacity compressor, following type of valve will be best suited

Disc or feather type
Poppet valve
Mechanical valve of the Corliss, sleeve, rotary or semi rotary type
Any of the above

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