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COMPRESSORS, GAS TURBINES AND JET ENGINES

Compressors, Gas Turbines and Jet Engines
In a jet propulsion unit, the products of combustion after passing through the gas turbine are discharged into

Vacuum
Atmosphere
Back to the compressor
Discharge nozzle

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Compressors, Gas Turbines and Jet Engines
The closed cycle in gas turbines

In never used
Provides lesser flexibility
Provides greater flexibility
Is used when gas is to be burnt

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Compressors, Gas Turbines and Jet Engines
The pressure ratio for an open cycle gas turbine compared to closed cycle gas turbine of same h.p. is

Same
Low
High
Low/high depending on make and type

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Compressors, Gas Turbines and Jet Engines
Air-fuel ratio in a jet engine will be of the order of

2.5006944444444
0.62569444444444
0.41736111111111
0.83402777777778

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

More
Zero
Less
Same

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