Question

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

a.

overheated spark plug points

b.

red hot carbon deposits on cylinder walls

c.

cylinder walls being too hot

d.

any of the mentioned

Answer: (d).any of the mentioned

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Q. Pre-ignition is caused by the spontaneous combustion of the mixture before the end of the compression stroke, and is due to __________

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