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Compressors, Gas Turbines and Jet Engines

Compressors, Gas Turbines and Jet Engines
In a centrifugal compressor, the flow of air is ________ to the axis of compressor.

None of these
Inclined
Parallel
Perpendicular

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Compressors, Gas Turbines and Jet Engines
What will be the volume of air at 327°C if its volume at 27°C is 1.5 m³/ mt?

3 m³/ mt.
18 m³/ mt.
6 m³/ mt.
1.5 m³/ mt.

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Compressors, Gas Turbines and Jet Engines
The degree of reaction of an axial flow turbine is the ratio of isentropic temperature drop in a blade row to the

Total temperature drop
Total adiabatic temperature drop
Adiabatic temperature drop in the stage
Total temperature drop in the stage

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Compressors, Gas Turbines and Jet Engines
In multistage compressor, the isothermal compression is achieved by

By constantly cooling the cylinder
By running compressor at very slow speed
Employing inter-cooler
By insulating the cylinder

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Compressors, Gas Turbines and Jet Engines
The thermal efficiency of a simple gas turbine for a given turbine inlet temperature with increase in pressure ratio

First increases and then decreases
Decreases
Increases
First decreases and then increases

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

Fatigue
Creep
Toughness
Corrosion resistance

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