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Compressors, Gas Turbines and Jet Engines

Compressors, Gas Turbines and Jet Engines
Reheating in gas turbine results in

Both (A) and (B) above
Decrease of thermal efficiency
Increase of work ratio
Decrease of work ratio

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Compressors, Gas Turbines and Jet Engines
In jet engines the products of combustion after passing through the gas turbine are discharged into

Atmosphere
Vacuum
Discharge nozzle
Back to the compressor

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Compressors, Gas Turbines and Jet Engines
Propulsion efficiency of the following order is obtained in practice

0.72
0.5
0.34
0.6

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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
Screw
Reciprocating
Centrifugal

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

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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.
1.5 m³/ mt.
6 m³/ mt.

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