Final answer:
A motorist should test and dry the brakes by gently applying them after exiting a water puddle.
Step-by-step explanation:
When driving through a water puddle, a motorist should test and dry the brakes by gently applying the brakes after exiting the puddle, without fully engaging them. This will help remove any water on the brake pads and improve braking performance. It is important to avoid slamming on the brakes or driving at high speeds through water puddles, as this can cause hydroplaning and loss of control.
For example, if a motorist drives through a water puddle and then notices reduced braking effectiveness, they should lightly tap the brakes a few times to remove the water and restore normal brake performance.