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Compressors, Gas Turbines and Jet Engines

Compressors, Gas Turbines and Jet Engines
Reheating in a gas turbine

Increases the turbine work
Increases the compressor work
Decreases the thermal efficiency
Increases the thermal efficiency

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Compressors, Gas Turbines and Jet Engines
In open cycle turbojet engines used in military aircraft, reheating the exhaust gas from the turbine by burning, more fuel is used to increase the

None of these
Efficiency of the engine
Both (A) and (B)
Thrust and range of aircraft

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Compressors, Gas Turbines and Jet Engines
High air-fuel ratio in gas turbines

Do not damage turbine blades
Improves thermal efficiency
Increases power output
Reduces exhaust temperature

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Compressors, Gas Turbines and Jet Engines
The thrust of a jet propulsion power unit can be increased by

All of these
Burning fuel after gas turbine
Injecting ammonia into the combustion chamber
Injecting water into the compressor

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Compressors, Gas Turbines and Jet Engines
Ratio of indicated H.P. and brake H.P. is known as

Adiabatic efficiency
Volumetric efficiency
Mechanical efficiency
Isothermal efficiency

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Compressors, Gas Turbines and Jet Engines
The pressure ratio in gas turbines is of the order of

0.16736111111111
2.5423611111111
0.084027777777778
0.37569444444444

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