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Compressors, Gas Turbines and Jet Engines

Compressors, Gas Turbines and Jet Engines
The most efficient method of compressing air is to compress it

Isothermally
Isentropically
Isochronically
Adiabatically

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Compressors, Gas Turbines and Jet Engines
In gas turbines, high thermal efficiency is obtained in

Closed cycle & Open cycle
Closed/open depending on other considerations
Closed cycle
Open cycle

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Compressors, Gas Turbines and Jet Engines
The blades of gas turbine are made of

Stainless steel
High nickel alloy
Carbon steel
High alloy steel

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Compressors, Gas Turbines and Jet Engines
The volumetric efficiency of a compressor falls roughly as follows for every 100 m increase in elevation

5%
0.1%
0.5%
1.0%

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Compressors, Gas Turbines and Jet Engines
For a two stage compressor, if index of compression for higher stage is greater than index of compression for lower stage, then the optimum pressure as compared to ideal case will

Increase
Remain unaffected
Other factors control it
Decrease

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Compressors, Gas Turbines and Jet Engines
The thrust on the rotor in a centrifugal compressor is produced by

Axial component
None of these
Radial component
Tangential component

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