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Compressors, Gas Turbines and Jet Engines

Compressors, Gas Turbines and Jet Engines
Reheating in a gas turbine

Increases the thermal efficiency
Increases the compressor work
Decreases the thermal efficiency
Increases the turbine work

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Compressors, Gas Turbines and Jet Engines
A closed cycle gas turbine works on

Rankine cycle
Ericsson cycle
Joule cycle
Carnot cycle

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

Centrifugal type
None of these
Radial flow type
Axial flow type

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Compressors, Gas Turbines and Jet Engines
Volumetric efficiency of a compressor decreases with ________ in compression ratio.

Remain same
Increase
Does not change
Decrease

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Compressors, Gas Turbines and Jet Engines
The clearance volume of the air compressor is kept minimum because

It allows maximum compression to be achieved
It permits isothermal compression
It results in minimum work
It greatly affects volumetric efficiency

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

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

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