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Compressors, Gas Turbines and Jet Engines

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

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

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Compressors, Gas Turbines and Jet Engines
The net work input required for compressor with increase in clearance volume

Decreases
Increases/decreases depending on compressor capacity
Remains same
Increases

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

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

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Compressors, Gas Turbines and Jet Engines
Which is false statement about multistage compression?

It is best suited for compression ratios around 7:1
The moisture in air is condensed in the inter-cooler
Power consumption per unit of air delivered is low
Volumetric efficiency is high

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Compressors, Gas Turbines and Jet Engines
During base load operation, the best method of controlling compressor is

Constant speed unloader
Variable speed
Start-stop motor
Relief valve

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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.

Equal to
Three times
Six times
Double

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