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Compressors, Gas Turbines and Jet Engines

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

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

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Compressors, Gas Turbines and Jet Engines
The stagnation pressure rise in a centrifugal compressor takes place

In the diffuser and impeller
In the impeller only
In the inlet guide vanes only
In the diffuser only

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Compressors, Gas Turbines and Jet Engines
Gas turbine as compared to internal combustion engine

Produces uniform torque
Has more efficiency
All of the listed here
Can be driven at a very high speed

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

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

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Compressors, Gas Turbines and Jet Engines
Diffuser in a compressor is used to

Convert pressure energy into kinetic energy
Convert kinetic energy into pressure energy
Make the flow streamline
Increase velocity

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

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

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MORE MCQ ON Compressors, Gas Turbines and Jet Engines

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