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Compressors, Gas Turbines and Jet Engines

Compressors, Gas Turbines and Jet Engines
The ideal efficiency of simple gas turbine cycle depends on

Minimum cycle temperature
Pressure ratio
Maximum cycle temperature
All of these

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Compressors, Gas Turbines and Jet Engines
The main purpose of reheating in gas turbine is to

Reduce turbine size
Increase speed
Increase temperature
Increase power output

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

0.084027777777778
2.5423611111111
0.16736111111111
0.37569444444444

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Compressors, Gas Turbines and Jet Engines
Cylinder clearance in a compressor should be

As small as possible
As large as possible
About 50% of swept volume
About 100% of swept volume

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Compressors, Gas Turbines and Jet Engines
The volume of air sucked by the compressor during its suction stroke is called

Free air delivery
Compressor capacity
Swept volume
None of these

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Compressors, Gas Turbines and Jet Engines
If V, U and Vr represent the absolute velocity of fluid, velocity of blade, and relative velocity of fluid, and suffix ‘I’ and ‘o’ stand for entry and exit conditions, then in a rotary machine whose degree of reaction is unity

Vi = Vo
Vt > Vo
V = Uo
U < Vo

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