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

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Compressors, Gas Turbines and Jet Engines
In a reciprocating air compressor, the compression work per kg of air

Decreases as clearance volume increases
Is independent of clearance volume
Increases as clearance volume decreases
Increases as clearance volume increases

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Compressors, Gas Turbines and Jet Engines
The criterion of the thermodynamic efficiency for rotary compressor is

None of the listed here
Polytropic compression
Isothermal compression
Isentropic compression

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Compressors, Gas Turbines and Jet Engines
A jet engine has

Propeller at back
Propeller on the top
Propeller in front
No propeller

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Compressors, Gas Turbines and Jet Engines
Inter cooling in compressors

Cools the delivered air
Is the standard practice for big compressors
Results in saving of power in compressing a given volume to given pressure
Enables compression in two stages

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Compressors, Gas Turbines and Jet Engines
The work ratio of a gas turbine plant is defined as the ratio of

Net work output and work done by turbine
Net work output and isentropic heat drop
Actual heat drop and isentropic heat drop
Net work output and heat supplied

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