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Compressors, Gas Turbines and Jet Engines

Compressors, Gas Turbines and Jet Engines
Which of the following fuels can be used in turbojet engines?

Liquid hydrogen
Kerosene
Methyl alcohol
High speed diesel oil

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Compressors, Gas Turbines and Jet Engines
The work ratio of a gas turbine plant is defined as the ratio of

Net work output and heat supplied
Net work output and isentropic heat drop
Actual heat drop and isentropic heat drop
Net work output and work done by turbine

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Compressors, Gas Turbines and Jet Engines
The overall thermal efficiency of an ideal gas turbine plant is (where r = Pressure ratio)

1 - (1/r) ɣ-1/ɣ
1 - r ɣ-1
r ɣ-1
1 - (1/r) ɣ/ɣ-1

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Compressors, Gas Turbines and Jet Engines
The maximum compression ratio in an actual single stage axial flow compressor is of the order of

0.045138888888889
0.048611111111111
0.043055555555556
0.00070833333333333

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

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

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Compressors, Gas Turbines and Jet Engines
Gas turbines for power generation are normally used

In emergency
To supply peak load requirements
To supply base load requirements
To enable start thermal power plant

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