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Tennessee Class D Knowledge Test Practice
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Passing target: 80% (32/40)
Weather, Visibility & EmergenciesStandalone practice
It has not rained for two weeks. As you drive, a light rain starts to fall. When is the road likely to be the most slippery?
A travels on a two-lane road as light rain begins after two dry weeks. No oil-film detail or most-slippery interval is selected in the question.
Correct answer: In the first few minutes, as the water mixes with oil and dirt.
Why
Oil and dirt build up on the road during dry weather. The first rain turns them into a slick film, and on a hot day oil in the asphalt can also rise to the surface. Slow down at the first sign of rain, leave more room to stop, and brake and steer gently.
Verified against Tennessee Comprehensive Driver License Manual · Driving in Inclement Weather Conditions — Rain · p. 89
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