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Compressors, Gas Turbines and Jet Engines

Compressors, Gas Turbines and Jet Engines
An air receiver is to be placed outside. Should it be placed in

Shade
Enclosed room
Rain
Sun

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Compressors, Gas Turbines and Jet Engines
Isothermal compression though most efficient, but is not practicable because

It requires very big cylinder
It does not increase pressure much
It is impossible in practice
Compressor has to run at very slow speed to achieve it

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Compressors, Gas Turbines and Jet Engines
The efficiency and work ratio of a gas turbine plant can be increased by

Injecting water in/around combustion chamber
All of these
Reheating the air after partial expansion in the turbine
Adding heat exchanger

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Compressors, Gas Turbines and Jet Engines
Compression efficiency is compared against

Isentropic compression
Adiabatic compression
Isothermal compression
Ideal compression

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

0.72
0.5
0.6
0.34

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Compressors, Gas Turbines and Jet Engines
The reason for volumetric efficiency of reciprocating compressor being less than 100 percent is

Clearance volume and leakages
Pressure drop across the valves
Superheating in compressor
All of these

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