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Compressors, Gas Turbines and Jet Engines

Compressors, Gas Turbines and Jet Engines
The maximum propulsion efficiency of a turbojet is attained at around following speed

550 km/hr
1700 km/hr
2400 km/hr
1050 km/hr

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Compressors, Gas Turbines and Jet Engines
Losses in a centrifugal compressor are due to

Impeller channel losses
All of the listed here
Inlet losses
Diffuser losses

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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
(p₁ - p₂)/2

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Compressors, Gas Turbines and Jet Engines
Maximum delivery pressure is a rotary air compressor is of the order of

6 kg/cm²
16 kg/cm²
25 kg/cm²
10 kg/cm²

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Compressors, Gas Turbines and Jet Engines
Axial flow compressor has the following advantage over centrifugal compressor

Larger air handling ability per unit frontal area
Higher average velocities
Aerofoil blades are used
Higher pressure ratio per stage

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Compressors, Gas Turbines and Jet Engines
In which case the air-fuel ratio is likely to be maximum?

Multi cylinder engine
4-stroke diesel engine
4-stroke petrol engine
Gas turbine

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MORE MCQ ON Compressors, Gas Turbines and Jet Engines

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