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Compressors, Gas Turbines and Jet Engines

Compressors, Gas Turbines and Jet Engines
The criterion of the thermodynamic efficiency for rotary compressor is

Isothermal compression
None of the listed here
Polytropic compression
Isentropic compression

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Compressors, Gas Turbines and Jet Engines
Standard air is the air at

Atmospheric conditions at any specific location
20°C and 1 kg/cm² and relative humidity 36%
15°C and 1 kg/cm²
0°C and standard atmospheric conditions

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Compressors, Gas Turbines and Jet Engines
The compressor efficiency is the

Isothermal H.P./shaft H.R
Compression work/motor input
Isothermal H.P/indicated H.R
Total output/air input

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Compressors, Gas Turbines and Jet Engines
The closed cycle in gas turbines

Provides lesser flexibility
Is used when gas is to be burnt
In never used
Provides greater flexibility

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

Adiabatically
Isothermally
Isentropically
Isochronically

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Compressors, Gas Turbines and Jet Engines
When the temperature of air leaving the inter-cooler, in a two stage compression with inter-cooler, is ________ the original atmospheric air temperature, then the intercooling is known as perfect or complete intercooling.

More than
Less than
None of these
Equal to

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