Safe Driving第 44 / 120 题
At what speed can hydroplaning begin when there is a large amount of water on the road?
a.As low as 30 mph
b.Only above 55 mph
c.Only above 70 mph
d.Only when tires are over-inflated
解析
With enough standing water, hydroplaning can start around 30 mph, and low tread depth or under-inflation makes it more likely. Believing it only happens at 55 or 70 mph leads drivers to keep unsafe speeds in heavy rain, and it is under-inflation rather than over-inflation that raises the risk.
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