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Compressors, Gas Turbines and Jet Engines

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

Increase efficiency
Control temperature
Control output of turbine
Control fire hazards

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Compressors, Gas Turbines and Jet Engines
The maximum combustion pressure in gas turbine as compared to I.C. engine is

Same
Depends on other factors
More
Less

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Compressors, Gas Turbines and Jet Engines
The process, which causes the air to enter the impeller blades of a centrifugal compressor at ________ velocity (without effecting the mass of air to flow and velocity of flow) is known as prewhirl.

Reduced
Zero
None of these
Increased

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Compressors, Gas Turbines and Jet Engines
Gas turbine as compared to steam turbine

All of these
Requires less space for installation
Has less efficiency
Has compressor and combustion chamber

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Compressors, Gas Turbines and Jet Engines
The efficiency of roots blower ________ with the increase in pressure ratio.

Decreases
Does not change
Increases
None of these

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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?

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

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