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Kentucky Class D Written Test Practice
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Safe & Responsible DrivingStandalone practice
At what blood-alcohol concentration does Kentucky’s under-21 per-se driving prohibition begin?
Correct answer: 0.02%
Why
For a driver under 21, the per-se threshold begins at 0.02 grams of alcohol per 100 milliliters of blood, expressed here as 0.02%, with the statute’s reliable-test and two-hour sample conditions. A reading of 0.08 or more is subject to the ordinary DUI penalties. These thresholds do not authorize driving while impaired at a lower concentration.
Verified against Kentucky Driver Manual · Under-21 alcohol concentration · p. 34
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