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Compressors, Gas Turbines and Jet Engines

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

Less
Same
Zero
More

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Compressors, Gas Turbines and Jet Engines
Which of the following fuels can be used in turbojet engines?

Kerosene
Methyl alcohol
High speed diesel oil
Liquid hydrogen

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

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

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Compressors, Gas Turbines and Jet Engines
A closed gas turbine in which fuel is burnt directly in the air is not possible because of

High friction losses
Increasing gas temperature
High specific volume
Paucity of O2

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Compressors, Gas Turbines and Jet Engines
Cylinder clearance in a compressor should be

As large as possible
About 100% of swept volume
As small as possible
About 50% of swept volume

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Compressors, Gas Turbines and Jet Engines
In a closed cycle gas turbine, the air is compressed

Isothermally
Isentropically
Polytropically
None of these

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