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Why must you never pour water on a hot tire or brake drum to cool it quickly?
- A.Water instantly repairs heat damage
- B.Rapid cooling can damage components and the steam and sudden change do not fix the underlying overheating problem; let them cool gradually
- C.Cooling with water is the factory method
- D.Hot components cannot be harmed by water
Correct answer
B. Rapid cooling can damage components and the steam and sudden change do not fix the underlying overheating problem; let them cool gradually
Why
The safe remedy for overheated running gear is time out of service and finding the cause, such as low pressure or a dragging brake. Quenching masks the symptom and can warp or crack metal parts.
Manual topic: Hot Weather - Cooling · From the General Knowledge practice bank (GK-320).