A spark plug is not necessary in a diesel engine because

1.	A spark plug is not necessary in a diesel engine because
Answer» DIESEL is more VOLATILE than petrol diesel has a lower ignition temperature than petrol calorific VALUE of diesel is more than that of petrol None of these Solution :DUE to higher compression ratio in diesel ENGINE the compressed air gets heated up to such a high temperature that the sprayed fuel catches fire on its own

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