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Compressors, Gas Turbines and Jet Engines

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
When the temperature of air leaving the inter-cooler, in a two stage compression with inter-cooler, is ________ the original atmospheric air temperature, then the intercooling is known as perfect or complete intercooling.

Equal to
Less than
More than
None of these

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

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

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Compressors, Gas Turbines and Jet Engines
For minimum work required to compress and deliver a quantity of air by multistage compression

The work-done in each stage should be same
The compression ratio in each stage should be same
The intercooling should be perfect
All of the listed here

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Compressors, Gas Turbines and Jet Engines
The power available for takeoff and climb in case of turbojet engine as compared to reciprocating engine is

Less
Same
More
May be less or more depending on ambient conditions

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Compressors, Gas Turbines and Jet Engines
The ratio of the discharge pressure to the inlet pressure of air is called

Compression ratio
Expansion ratio
Compressor efficiency
Volumetric efficiency

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