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Utah Class D Written Knowledge Test Practice
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Safe & Responsible DrivingStandalone practice
Your friend, who is over 21, says that one drink is fine before driving because it keeps him below the 0.05 legal limit. What does the handbook say about low levels of alcohol?
Correct answer: Impairment starts with the first drink, and vision is affected at 0.02
Why
Alcohol blurs vision, slows focusing and reduces your ability to judge distance, speed and the movement of other vehicles. The handbook also says that a driver who is impaired to an unsafe degree breaks the law even below the legal limit. The best advice is not to drive after any alcohol or impairing drug.
Verified against Utah Driver Handbook · Effects of alcohol and drugs · p. 61, 62
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