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Tennessee Car / Permit: Alcohol & Drugs practice test

Blood alcohol limits, zero-tolerance and implied-consent laws, and how alcohol and drugs — legal or not — affect your driving.

Content reviewed against official driver handbooks · August 12, 2026

15 questions · pass with 12 correct. You get instant feedback and an explanation after every answer.

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Study questions with answers

12 sample Alcohol & Drugs questions with the correct answer, a short explanation, and the official handbook reference. Read through them, then take the quiz above.

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  1. 1. In Tennessee, an adult driver is legally intoxicated when the blood alcohol concentration reaches:

    Correct answer: .08 percent

    A BAC of .08 percent or higher is always illegal for adult drivers in Tennessee.

    Source: Tennessee Comprehensive Driver License Manual — Blood Alcohol Concentration

  2. 2. The manual states that at least what share of the knowledge test consists of questions about alcohol and drugs?

    Correct answer: 25 percent

    By law, at least 25 percent of the questions on the knowledge test deal with driving under the influence of alcohol or drugs.

    Source: Tennessee Comprehensive Driver License Manual — Alcohol, Other Drugs and Driving

  3. 3. A driver whose breath test shows .00 percent alcohol:

    Correct answer: Can still be convicted of DUI if impaired by drugs

    A BAC below .08 does not clear a driver; someone impaired by drugs can register .00 alcohol and still be convicted of DUI.

    Source: Tennessee Comprehensive Driver License Manual — Driving Under the Influence of Drugs or Alcohol

  4. 4. A 12-ounce bottle of beer holds about the same amount of alcohol as:

    Correct answer: A one-ounce shot of whiskey

    One 12-ounce beer contains about the same alcohol as a 1-ounce shot of whiskey.

    Source: Tennessee Comprehensive Driver License Manual — Did You Know

  5. 5. A driver who is at least 16 but under 21 can be convicted of underage driving while impaired at a BAC as low as:

    Correct answer: .02 percent

    For drivers under 21, a BAC of .02 percent is enough to be convicted of underage driving while impaired.

    Source: Tennessee Comprehensive Driver License Manual — Under 21 Laws

  6. 6. As the percentage of alcohol in a person's blood rises, that person becomes:

    Correct answer: More intoxicated

    A higher BAC means greater impairment; the more alcohol in the blood, the more intoxicated the person is.

    Source: Tennessee Comprehensive Driver License Manual — Blood Alcohol Concentration

  7. 7. The only thing that will actually sober up a person who has been drinking is:

    Correct answer: Letting time pass

    Coffee, cold showers, and exercise do not help; only the passage of time reduces the alcohol in your system.

    Source: Tennessee Comprehensive Driver License Manual — How Does Alcohol Affect the Body

  8. 8. Mixing alcohol with another depressant such as a tranquilizer or sedative can be especially dangerous because the effects are:

    Correct answer: Multiplied rather than simply added

    When alcohol is combined with another depressant the effects are not merely added; they are multiplied, making impairment much worse.

    Source: Tennessee Comprehensive Driver License Manual — Every Day Drugs

  9. 9. If a person 18, 19, or 20 years old is convicted of possessing alcohol, even without driving, the penalty includes:

    Correct answer: Loss of the driving privilege for one year

    An 18-to-20-year-old convicted of purchasing or possessing alcohol loses their driving privilege for one year, whether or not they were driving.

    Source: Tennessee Comprehensive Driver License Manual — Under 21 Laws

  10. 10. In Tennessee, how do DUI penalties for drug impairment compare with those for alcohol?

    Correct answer: The same as for alcohol

    DUI penalties are the same whether the impairment comes from alcohol or from drugs, including prescription and over-the-counter medicines.

    Source: Tennessee Comprehensive Driver License Manual — Consequences of a DUI Arrest

  11. 11. Having food in the stomach before drinking alcohol will:

    Correct answer: Slow how quickly the alcohol is absorbed

    Food slows the rate at which alcohol is absorbed, but all the alcohol eventually reaches the blood whether or not you have eaten.

    Source: Tennessee Comprehensive Driver License Manual — Amount of Food in the Stomach

  12. 12. Alcohol acts on the body as a:

    Correct answer: Depressant

    Alcohol is a depressant that slows nerve impulses and body functions; the brief feeling of stimulation comes from lowered inhibitions.

    Source: Tennessee Comprehensive Driver License Manual — Alertness and Concentration

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Every Tennessee question is written from the official Tennessee driver handbook and checked against its current edition. DMV Test Free is a free, independent study resource — not affiliated with any DMV or government agency. About DMV Test Free