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Compressors, Gas Turbines and Jet Engines

Compressors, Gas Turbines and Jet Engines
Work ratio of a gas turbine may be improved by

Increasing the compression work
Decreasing the compression work
Increasing the turbine work
Both (A) and (C) above

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Compressors, Gas Turbines and Jet Engines
Out of the following, from where you will prefer to take intake for air compressor

From a side where cooling tower is located nearby
From coal yard side
From outside atmosphere at 1°C
From an air conditioned room maintained at 20°C

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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%
0.5%
1.0%
0.1%

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

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

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

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

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Compressors, Gas Turbines and Jet Engines
Reheating in a gas turbine

Increases the thermal efficiency
Decreases the thermal efficiency
Increases the turbine work
Increases the compressor work

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MORE MCQ ON Compressors, Gas Turbines and Jet Engines

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