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Octane Number Requirement (ONR) of an engine is affected by:
Question

Octane Number Requirement (ONR) of an engine is affected by:

A.

Air-fuel ratio

B.

Combustion chamber design

C.

Ignition timing

D.

All of the above

Correct option is D

The octane number requirement of an engine depends on factors such as air-fuel ratio, combustion chamber shape, and ignition timing, which influence knocking resistance.

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