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Compressors, Gas Turbines and Jet Engines

Compressors, Gas Turbines and Jet Engines
The maximum propulsion efficiency of a turbojet is attained at around following speed

550 km/hr
2400 km/hr
1050 km/hr
1700 km/hr

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Compressors, Gas Turbines and Jet Engines
Work ratio of a gas turbine plant is ratio of

Work done by turbine and net work output
Net work output and heat supplied
Net work output and work done by turbine
Work done by turbine and heat supplied

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Compressors, Gas Turbines and Jet Engines
Stalling of blades in axial flow compressor is the phenomenon of

Air stream blocking the passage
Air stream not able to follow the blade contour
Unsteady periodic and reversed flow
Motion of air at sonic velocity

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Compressors, Gas Turbines and Jet Engines
The efficiency and work ratio of a gas turbine plant can be increased by

Reheating the air after partial expansion in the turbine
Injecting water in/around combustion chamber
All of these
Adding heat exchanger

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Compressors, Gas Turbines and Jet Engines
The material commonly used for air craft gas turbine is

Stainless steel
Timken, Haste alloys
Duralumin
High alloy steel

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Compressors, Gas Turbines and Jet Engines
Only rocket engines can be propelled to space because

These engines can work on several fuels
They can generate very high thrust
They are not air breathing engines
They have high propulsion efficiency

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MORE MCQ ON Compressors, Gas Turbines and Jet Engines

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