CDL · Night and weather
What causes a bus to hydroplane?
Correct answer: A layer of water between the tires and the road.
Answer options
- AA layer of water between the tires and the road Correct
- BStreaks of oil spread across the road surface
- CPavement that has turned soft in extreme heat
Why
When water collects between the tires and the road, the tires ride up on it and lose their grip; that is hydroplaning. Oil streaks and heat-softened pavement can make a road slippery, but they do not cause hydroplaning.
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
- How should you respond when your vehicle begins to hydroplane?
- Your vehicle starts to hydroplane on a wet road. What should you do?
- When is the road surface usually at its most slippery?
- When deep puddles or moving water cannot be avoided, what helps keep your brakes effective?
- Glare ice has left the highway extremely slick. Which of these is a sensible action?
- When should you be especially alert for black ice?
- When a road like the one shown is wet, by roughly how much should you lower your speed?
- Which of these should you avoid doing on a slippery road?
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