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Compressors, Gas Turbines and Jet Engines

Compressors, Gas Turbines and Jet Engines
Efficiency of gas turbine is increased by

Adding a regenerator
Inter cooling
Reheating
All of the listed here

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Compressors, Gas Turbines and Jet Engines
For slow speed large capacity compressor, following type of valve will be best suited

Poppet valve
Mechanical valve of the Corliss, sleeve, rotary or semi rotary type
Any of the above
Disc or feather type

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

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

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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
All of these
Pressure drop across the valves
Superheating in compressor

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Compressors, Gas Turbines and Jet Engines
Pick up wrong statement. Surging phenomenon in centrifugal compressor depends on

Change in load
Pressure ratio
Stagnation pressure at the outlet
Mass flow rate

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Compressors, Gas Turbines and Jet Engines
The working fluid in a turbine is

In three phases
In the form of air and water mixture
In two phases
In a single phase

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MORE MCQ ON Compressors, Gas Turbines and Jet Engines

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