NHSA Module 9 Practice Test

For someone under the legal drinking age, a DUI is defined by a BAC of what?

0.08 0.02 0.10 0.00

Correct Answer:

0.02

Explanation:

Laws for drivers under 21 use a zero-tolerance approach to alcohol. A BAC of 0.02% or higher is considered DUI for someone who hasn’t reached the legal drinking age, because even small amounts of alcohol can noticeably impair judgment, reaction time, and coordination in young drivers. This lower threshold is designed to deter any drinking and driving by this age group. The other numbers are adult limits, not the under-21 standard. BACs of 0.08% and 0.10% are typical driving-under-the-influence thresholds for many adults, and a BAC of 0.00% would mean no alcohol in the blood at all, which isn’t used to define DUI for underage drivers.

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