CDL Commercial Driver's License Knowledge Test

What is hydroplaning and at what speed does it typically begin?

Driving in a plane during rain When tires ride on a layer of water rather than the road surface, typically starting around 30 mph on wet roads Driving too slowly in rain Only happens at speeds above 70 mph

Correct Answer:

When tires ride on a layer of water rather than the road surface, typically starting around 30 mph on wet roads

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