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Compressors, Gas Turbines and Jet Engines

Compressors, Gas Turbines and Jet Engines
The efficiency of a jet engine is higher at

High speeds
High altitudes
Low speeds
Low altitudes

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Compressors, Gas Turbines and Jet Engines
For an irreversible gas turbine cycle, the efficiency and work ratio both depend on

Pressure ratio alone
Maximum cycle temperature alone
Both pressure ratio and maximum cycle temperature
Minimum cycle temperature alone

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

2.5423611111111
0.37569444444444
0.084027777777778
0.16736111111111

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Compressors, Gas Turbines and Jet Engines
The work done per unit mass of air in compression will be least when 'n' is equal to

1.4
1.2
1
1.3

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Compressors, Gas Turbines and Jet Engines
Pick up the wrong statement about advantages of multistage compression

More loss of air due to leakage past the cylinder
Better lubrication is possible advantages of multistage
Air can be cooled perfectly in between
Mechanical balance is better

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Compressors, Gas Turbines and Jet Engines
A rocket works with maximum overall efficiency when air craft velocity is equal to the

Average of the jet velocity
Twice the jet velocity
Half the jet velocity
Jet velocity

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MORE MCQ ON Compressors, Gas Turbines and Jet Engines

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