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Compressors, Gas Turbines and Jet Engines

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

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

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Compressors, Gas Turbines and Jet Engines
The indicated work per unit mass of air delivered is

Inversely proportional to clearance volume
Directly proportional to clearance volume
Not affected by clearance volume
Greatly affected by clearance volume

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Compressors, Gas Turbines and Jet Engines
The process, which causes the air to enter the impeller blades of a centrifugal compressor at ________ velocity (without effecting the mass of air to flow and velocity of flow) is known as prewhirl.

None of these
Reduced
Increased
Zero

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Compressors, Gas Turbines and Jet Engines
Volumetric efficiency is

Index of compressor performance
The ratio of stroke volume to clearance volume
Reciprocal of compression ratio
The ratio of the air actually delivered to the amount of piston displacement

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Compressors, Gas Turbines and Jet Engines
Euler's equation can be used for

Radial flow compressors
Pumps
Axial flow compressors
All of these

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Compressors, Gas Turbines and Jet Engines
The volumetric efficiency of a compressor falls roughly as follows for every 5°C increase in atmospheric temperature

0.001
0.005
0.01
0.05

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