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Alcohol, Other Drugs and Driving — Tennessee Driver's License Practice Test

Alcohol, Other Drugs and DrivingQuestion 1 of 30

63 questions in this topic · 30 drawn at random this round

If a person whose license is revoked for DUI applies for a photo ID, what must the ID indicate?

Tennessee Comprehensive Driver License Manual

All questions are based on the official Tennessee Comprehensive Driver License Manual (TN Dept. of Safety & Homeland Security). Study the relevant chapter to reinforce your knowledge.

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This Tennessee Driver's License Alcohol, Other Drugs and Driving practice set has 63 practice questions based on the official exam materials, each with an instant explanation. You need 80% on the real Tennessee Driver's License knowledge test to pass.

Topic overview

This is one of the most important sections in the manual — by law, at least a quarter of the knowledge-test questions deal with driving under the influence. It explains how alcohol affects your body: it is absorbed within a minute or two, only the liver can remove it at about one drink per hour, and nothing but time can sober you up. Coffee, a cold shower, and exercise do not speed it along.

Blood Alcohol Concentration (BAC) measures how much alcohol is in your blood, and the higher it climbs the more your judgment, vision, reaction time, and coordination suffer — impairment begins with very small amounts. In Tennessee, a BAC of .08 is always illegal. Drivers under 21 face stiff penalties at just .02, and remember that alcohol is a depressant: the "stimulated" feeling is really just lowered inhibitions. Prescription and over-the-counter drugs can impair you too, and being prescribed a drug is no legal defense.

Tennessee's Implied Consent Law means that by driving here, you have already agreed to be tested for alcohol or drugs if an officer has reasonable grounds. If you are arrested and refuse the test, your driving privileges will likely be suspended for twelve months. A DUI conviction is separate and far more serious: it brings jail time, heavy fines, and revocation of your license — and the penalties climb sharply with each repeat offense. The section also covers ignition interlock devices and the special rules for underage drinkers.

What is the legal BAC limit in Tennessee?

In Tennessee, a Blood Alcohol Concentration of .08 is always illegal for adult drivers. But impairment starts well below that — judgment and vision suffer at .03 to .04 — and drivers under 21 can face stiff penalties at a BAC as low as .02. You can also be convicted of DUI for drug impairment even with a BAC of .00.

What happens if I refuse a breath or blood test?

Under Tennessee's Implied Consent Law, driving in the state means you have already consented to testing when an officer has reasonable grounds. If you are arrested and refuse, your driving privileges will likely be suspended for twelve months. Refusing does not make the situation go away — under the No Refusal law, officers can seek a warrant to draw a blood sample.

Can coffee or a cold shower sober me up faster?

No. Only time can sober you up. The liver removes alcohol at a fixed rate of about one drink per hour, and nothing — not coffee, not exercise, not a cold shower — can speed that up. It takes about one hour to cancel the effects of one drink and roughly three hours for three drinks. If you've been drinking, the only safe plan is to let time pass or let someone sober drive.

Written from the official Tennessee Comprehensive Driver License Manual — Alcohol, Other Drugs and Driving ↗· Last checked: 2026-07-10· Reviewed by the PassPrep editorial team· How we verify →

Sample questions

Three questions from the Alcohol, Other Drugs and Driving bank with the correct answer and an explanation. The practice quiz above draws 30 questions at random from the same bank.

  1. By Tennessee law, at least what percentage of the questions on the knowledge test must deal with driving under the influence of drugs or alcohol?

    • 25 percent — Correct answer
    • 5 percent
    • 50 percent
    • 10 percent

    Explanation: Tennessee takes impaired driving seriously: by law, at least 25 percent of the questions on the knowledge test must consist of questions dealing with driving under the influence of drugs or alcohol.

    Handbook: Alcohol, Other Drugs and Driving — The Knowledge Test

  2. Between 10:00 p.m. and 2:00 a.m., approximately how many of every 10 drivers is estimated to be intoxicated?

    • About 1 of every 10 — Correct answer
    • About 3 of every 10
    • About 5 of every 10
    • About 1 of every 100

    Explanation: Researchers estimate that between the hours of 10:00 p.m. and 2:00 a.m., 1 of every 10 drivers is intoxicated.

    Handbook: Alcohol, Other Drugs and Driving — Impaired Driving

  3. Nearly what percentage of drivers arrested for DUI are social to moderate drinkers?

    • Nearly 50 percent — Correct answer
    • Nearly 10 percent
    • Nearly 90 percent
    • Nearly 25 percent

    Explanation: Nearly 50 percent of the drivers arrested for driving under the influence (DUI) are social to moderate drinkers — DUI is not limited to heavy drinkers.

    Handbook: Alcohol, Other Drugs and Driving — Impaired Driving