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Compressors, Gas Turbines and Jet Engines

Compressors, Gas Turbines and Jet Engines
Reheating in multistage expansion gas turbine results in

High thermal efficiency
Maximum work output
Decrease of heat loss in exhaust
Reduction in compressor work

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Compressors, Gas Turbines and Jet Engines
In jet engines, paraffin is usually used as the fuel because of its

Ease of atomisation
High calorific value
Both (A) and (C) above
Low freezing point

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

Increase of work ratio
Both (A) and (B) above
Decrease of thermal efficiency
Decrease of work ratio

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Compressors, Gas Turbines and Jet Engines
The volumetric efficiency of compressor with increase in compression ratio will

Increase
Remain same
May increase or decrease depending on clearance volume
Decrease

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Compressors, Gas Turbines and Jet Engines
High air-fuel ratio in gas turbines

Improves thermal efficiency
Do not damage turbine blades
Increases power output
Reduces exhaust temperature

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

Gas turbine
Compressor
I.C engine
Air motor

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