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Compressors, Gas Turbines and Jet Engines

Compressors, Gas Turbines and Jet Engines
The following property is most important for material used for gas turbine blade

Creep
Toughness
Fatigue
Corrosion resistance

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Compressors, Gas Turbines and Jet Engines
In jet propulsion power unit, the inlet duct of diverging shape is used in order to

Collect more air
Provide robust structure
Beautify the shape
Convert kinetic energy of air into pressure energy

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Compressors, Gas Turbines and Jet Engines
Volumetric efficiency of a compressor decreases with ________ in compression ratio.

Increase
Remain same
Decrease
Does not change

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

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

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

15: 1
50: 1.
30: 1
7: 1

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Compressors, Gas Turbines and Jet Engines
The maximum combustion pressure in gas turbine as compared to I.C. engine is

Depends on other factors
More
Same
Less

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