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Compressors, Gas Turbines and Jet Engines

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

5%
1.0%
0.1%
0.5%

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Compressors, Gas Turbines and Jet Engines
The temperature of air at the beginning of the compression stroke is ________ the atmospheric temperature.

None of these
Less than
More than
Equal to

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Compressors, Gas Turbines and Jet Engines
The axial flow compressor is preferred in aircraft gas turbines because of

None of the listed here
Higher thrust
High pressure rise
Low frontal area

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Compressors, Gas Turbines and Jet Engines
The maximum combustion pressure in gas turbine as compared to I.C. engine is

More
Less
Depends on other factors
Same

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Compressors, Gas Turbines and Jet Engines
For maximum work, the reheating should be done to an intermediate pressure of (Where p₁ = Maximum pressure, and p₂ = Minimum pressure)

p₁/p₂
(p₁ + p₂)/2
(p₁ - p₂)/2
p₁ p₂

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

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

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