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Compressors, Gas Turbines and Jet Engines

Compressors, Gas Turbines and Jet Engines
In gas turbines, high thermal efficiency is obtained in

Closed cycle
Closed cycle & Open cycle
Open cycle
Closed/open depending on other considerations

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Compressors, Gas Turbines and Jet Engines
After-cooler is used to

Cool the air
Reduce volume
Decrease the delivery temperature for ease in handling
Cause moisture and oil vapour to drop out

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Compressors, Gas Turbines and Jet Engines
As the turbine inlet temperature increases, the thermal efficiency of gas turbine for the optimum pressure ratio

Decreases
Remain same
Increases
First increases and then decreases

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Compressors, Gas Turbines and Jet Engines
The compressor efficiency is the

Compression work/motor input
Total output/air input
Isothermal H.P./shaft H.R
Isothermal H.P/indicated H.R

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Compressors, Gas Turbines and Jet Engines
Fighter bombers use following type of engine

Ramjet
Turbo-propeller
Rocket
Turbojet

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Compressors, Gas Turbines and Jet Engines
The indicated work per unit mass of air delivered is

Not affected by clearance volume
Inversely proportional to clearance volume
Greatly affected by clearance volume
Directly proportional to clearance volume

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MORE MCQ ON Compressors, Gas Turbines and Jet Engines

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