CDL · Night and weather
What causes hydroplaning?
Correct answer: A film of water forming between the tires and the road.
Answer options
- AStreaks of oil that have spread across the road
- BA film of water forming between the tires and the road Correct
- CHot weather softening the asphalt beneath the tires
Why
Hydroplaning happens when water collects between the tires and the road, so the tires ride on the water instead of gripping the pavement and the vehicle stops responding well to steering or braking. It can occur even at about 30 mph, and worn tread or underinflated tires raise the risk.
About this question
Topic: Night and weather License: CDL
Part of these practice sets:
Where it applies: Asked in every state.
Practice the whole set
This question is part of Slippery Roads and Hydroplaning (20 questions). Take the full set and check your score.
Practice Slippery Roads and HydroplaningMore questions from Slippery Roads and Hydroplaning
- On a cold day, the temperature climbs just enough for ice on the road to start melting. What happens to the road surface?
- If your route takes you through deep or swiftly flowing water, which of these is a mistake?
- Which of these problems can occur when your brakes get soaked in heavy rain or deep water?
- Under what conditions should you be on the lookout for black ice?
- On a slick road surface, which of these actions should you avoid?
- What should you do when driving on slippery pavement?
- Hydroplaning is most likely where water has pooled on the pavement. What can warn you that water is standing on the road?
- Which statement about hydroplaning is true?
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