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Compressors, Gas Turbines and Jet Engines

Compressors, Gas Turbines and Jet Engines
A rotary compressor is driven by an

Either (A) or (B)
None of these
Engine
Electric motor

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Compressors, Gas Turbines and Jet Engines
Volumetric efficiency of air compressors is of the order of

60 - 70%
20 - 30%
70 - 90%
40 - 50%

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Compressors, Gas Turbines and Jet Engines
For supplying intermittent small quantity of air at high pressure, following compressor is best suited

Axial
Reciprocating
Screw
Centrifugal

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Compressors, Gas Turbines and Jet Engines
There is a certain pressure ratio (optimum) for a gas turbine at which its thermal efficiency is maximum. With increase in turbine temperature, the value of pressure ratio for the peak efficiency would

Decrease
None of these
Increase
Remain same

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Compressors, Gas Turbines and Jet Engines
The temperature of air at the beginning of the compression stroke is ________ the atmospheric temperature.

None of these
More than
Less than
Equal to

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

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

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