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Internal Combustion Engines

Internal Combustion Engines
In order to prevent knocking in spark ignition engines, the charge away from the spark plug should have

All of these
Long ignition delay
Low density
Low temperature

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Internal Combustion Engines
In a four stroke cycle, the minimum temperature inside the engine cylinder occurs at the

End of suction stroke
End of exhaust stroke
Beginning of suction stroke
Beginning of exhaust stroke

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Internal Combustion Engines
Which of the following statement is correct regarding normal cetane?

Its chemical name is normal hexadecane
It is a standard fuel used for knock rating of diesel engines
It has long carbon chain structure
All of these

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Internal Combustion Engines
The sensing element in the control system of nuclear reactors measures the _________ of the neutron flux in the reactor.

Temperature
None of these
Density
Volume

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Internal Combustion Engines
The ratio of the indicated thermal efficiency to the air standard efficiency is known as

Mechanical efficiency
Overall efficiency
Volumetric efficiency
Relative efficiency

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Internal Combustion Engines
Pre-ignition is caused by the spontaneous combustion of the mixture before the end of the compression stroke, and is due to

Any one of the listed here
Cylinder walls being too hot
Red hot carbon deposits on cylinder walls
Overheated spark plug points

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