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Internal Combustion Engines

Internal Combustion Engines
Alpha-methyl-naphthalene (C11H10) has a cetane number of

100
0
120
50

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Internal Combustion Engines
The knocking in spark ignition engines can be reduced by

Increasing the engine speed
None of these
Retarding the spark
Both (A) and (B)

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Internal Combustion Engines
The pressure inside the cylinder is _________ the atmospheric pressure during the exhaust stroke.

None of these
Below
Equal to
Above

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Internal Combustion Engines
In loop scavenging, the top of the piston is

Slanted
Flat
Contoured
Depressed

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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
Red hot carbon deposits on cylinder walls
Overheated spark plug points
Cylinder walls being too hot

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Internal Combustion Engines
Stoichiometric ratio is

Actual air-fuel ratio for maximum efficiency
Chemically correct air-fuel ratio by volume
Chemically correct air-fuel ratio by weight
None of these

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