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Compressors, Gas Turbines and Jet Engines

Compressors, Gas Turbines and Jet Engines
The work ratio of simple gas turbine cycle depends on

Pressure ratio
Maximum cycle temperature
All of these
Minimum cycle temperature

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Compressors, Gas Turbines and Jet Engines
Propulsion efficiency of the following order is obtained in practice

0.72
0.6
0.5
0.34

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Compressors, Gas Turbines and Jet Engines
An after-cooler is used to

Cause moisture and oil vapour to drop out
Remove impurities from air
Reduce volume of air
Cool the air

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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)/2
p₁/p₂
(p₁ + p₂)/2
p₁ p₂

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Compressors, Gas Turbines and Jet Engines
Mechanical efficiency of gas turbines as compared to I.C engines is

Higher
Same
Lower
None of these

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Compressors, Gas Turbines and Jet Engines
1 m of air at atmospheric condition weighs approximately

1.0 kg
0.5 kg
1.3 kg
2.2 kg

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MORE MCQ ON Compressors, Gas Turbines and Jet Engines

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