Internal Combustion Engines
If petrol is used in a diesel engine, then

Black smoke will be produced
Efficiency will be low
Higher knocking will occur
Low power will be produced

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Internal Combustion Engines
Volatility of diesel fuel oil is

Temperature at which it solidifies or congeals
It catches fire without external aid
Minimum temperature to which oil is heated in order to give off inflammable vapours in sufficient quantity to ignite momentarily when brought in contact with a flame
Indicated by 90% distillation temperature, i.e., when 90% of sample oil has distilled off

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Internal Combustion Engines
In a typical medium speed 4-stroke cycle diesel engines

Exhaust valve opens at 35° before bottom dead center and closes at 20° after top dead center
Exhaust valve opens just after bottom dead center and closes just before top dead center
May open and close anywhere
Exhaust valve opens at bottom dead center and closes at top dead center

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