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Compressors, Gas Turbines and Jet Engines

Compressors, Gas Turbines and Jet Engines
The effective power of gas turbines is increased by adding the following in compressor

Ammonia and water vapour
Hydrogen
Nitrogen
Carbon dioxide

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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
Two times
Three times

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Compressors, Gas Turbines and Jet Engines
Phenomenon of choking in compressor means

Reducing mass flow rate with increase in pressure ratio
Fixed mass flow rate regardless of pressure ratio
Increased inclination of chord with air steam
No flow of air

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Compressors, Gas Turbines and Jet Engines
Gas turbine cycle with regenerator

Allows high compression ratio
Decreases heat loss is exhaust
Allows operation at very high altitudes
Increases thermal efficiency

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Compressors, Gas Turbines and Jet Engines
The type of rotary compressor used in aeroplanes, is of

Radial flow type
Centrifugal type
None of these
Axial flow type

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Compressors, Gas Turbines and Jet Engines
The velocity of air entering in a rocket is ___ as compared to an aircraft.

More
Zero
Same
Less

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