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Compressors, Gas Turbines and Jet Engines

Compressors, Gas Turbines and Jet Engines
In which case the air-fuel ratio is likely to be maximum?

4-stroke diesel engine
Multi cylinder engine
Gas turbine
4-stroke petrol engine

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Compressors, Gas Turbines and Jet Engines
An air compressor may be controlled by

Blow off control
Any one of the above
Clearance control
Throttle control

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Compressors, Gas Turbines and Jet Engines
In a high pressure compressor, the delivery pressure is

5 to 8 bar
1 to 5 bar
10 to 15 bar
8 to 10 bar

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Compressors, Gas Turbines and Jet Engines
The thermal efficiency of a simple gas turbine for a given turbine inlet temperature with increase in pressure ratio

Increases
First increases and then decreases
Decreases
First decreases and then increases

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Compressors, Gas Turbines and Jet Engines
The minimum work required for a three stage reciprocating air compressor is ___ the work required for each stage.

Double
Six times
Three times
Equal to

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Compressors, Gas Turbines and Jet Engines
The air entry velocity m a rocket as compared to aircraft is

More
Less
Same
Zero

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