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Compressors, Gas Turbines and Jet Engines

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

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

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

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

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

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

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Compressors, Gas Turbines and Jet Engines
There is a certain pressure ratio (optimum) for a gas turbine at which its thermal efficiency is maximum. With increase in turbine temperature, the value of pressure ratio for the peak efficiency would

None of these
Decrease
Increase
Remain same

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Compressors, Gas Turbines and Jet Engines
A machine used to raise the pressure of air is called

I.C engine
Air motor
Compressor
Gas turbine

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Compressors, Gas Turbines and Jet Engines
The air is delivered ________ in one revolution in case of a three lobbed rotor.

Six times
Four times
Three times
Two times

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