CDL · Night and weather
Under what conditions should you be on the lookout for black ice?
Correct answer: Whenever temperatures are below freezing and the road surface appears wet.
Answer options
- AWhen temperatures stay above freezing and the road surface is dry
- BOnly while snow is actively falling on the roadway
- CWhenever temperatures are below freezing and the road surface appears wet Correct
Why
Black ice forms a coating so thin and transparent that the road beneath it shows through, which makes the pavement look merely wet. When the temperature is under freezing and the road appears wet, assume ice may be present.
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
- If your route takes you through deep or swiftly flowing water, which of these is a mistake?
- What should you do when driving on slippery pavement?
- What causes hydroplaning?
- Which statement about hydroplaning is true?
- On a cold day, the temperature climbs just enough for ice on the road to start melting. What happens to the road surface?
- Slippery when wet: A driver approaching this sign should be ready for:
- Which of these problems can occur when your brakes get soaked in heavy rain or deep water?
- Which of these should you avoid doing on a slippery road?
Practice on your phone.
Practice here in your browser, or use the app with the same questions and explanations. It's free on the App Store.