Qstnid -I-11-if An Automobile Engine Is Overheated, It Is Cooled By Pouring Water On It. It Is Advised That The Water Should Be Poured Slowly With The Engine Running. Explain The Reason. - 23: Heat And Temperature

with Solutions -

#11
If an automobile engine is overheated, it is cooled by pouring water on it. It is advised that the water should be poured slowly with the engine running. Explain the reason.
Ans : In a hot engine the hot parts are expanded because of heat, if cold water is poured suddenly then there will be uneven thermal contraction in the parts. This will result in a stress to develop between the various parts of the engine and may let the engine to crack down.
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