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Compressors, Gas Turbines and Jet Engines

Compressors, Gas Turbines and Jet Engines
Water is injected in gas turbine cycle to

Control output of turbine
Control temperature
Increase efficiency
Control fire hazards

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

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

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Compressors, Gas Turbines and Jet Engines
Which is false statement about advantages of multistage compressor in comparison to single stage compressor?

Better mechanical balance
Less loss of air due to leakage past the cylinder
Less power requirement
Lower volumetric efficiency

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

Two times
Three times
Four times
Six times

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Compressors, Gas Turbines and Jet Engines
In a jet propulsion unit, the products of combustion after passing through the gas turbine are discharged into

Vacuum
Back to the compressor
Atmosphere
Discharge nozzle

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Compressors, Gas Turbines and Jet Engines
Work ratio of a gas turbine plant is ratio of

Work done by turbine and net work output
Net work output and work done by turbine
Net work output and heat supplied
Work done by turbine and heat supplied

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