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Compressors, Gas Turbines and Jet Engines

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.
1.5 m³/ mt.
6 m³/ mt.

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Compressors, Gas Turbines and Jet Engines
The ratio of the discharge pressure to the inlet pressure of air is called

Compressor efficiency
Volumetric efficiency
Expansion ratio
Compression ratio

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Compressors, Gas Turbines and Jet Engines
In a single acting reciprocating air compressor, without clearance, the compression of air may be

Any one of these
Polytropic
Isothermal
Isentropic

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Compressors, Gas Turbines and Jet Engines
Actual compression curve is

Better than isothermal and adiabatic
In between isothermal and adiabatic
Same as adiabatic
Same as isothermal

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Compressors, Gas Turbines and Jet Engines
The process, which causes the air to enter the impeller blades of a centrifugal compressor at ________ velocity (without effecting the mass of air to flow and velocity of flow) is known as prewhirl.

Increased
None of these
Reduced
Zero

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Compressors, Gas Turbines and Jet Engines
Ratio of indicated h.p. to shaft h.p. in known as

Volumetric efficiency
Compressor efficiency
Mechanical efficiency
Isothermal efficiency

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