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Idaho permit test: alcohol, drugs and dui

Administrative license suspension, test refusal, ignition interlock, how alcohol affects driving, open containers, drugs and DUI. 24 questions, 10 at a time, starting with ones you haven't seen.

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Rules to remember10 key alcohol, drugs and dui rulesShow the rules
  1. You may ask for an administrative hearing on an ALS, but you must request it within 7 days of the date on the notice. (p. 125)
  2. Under implied consent, refusing a requested test brings a license suspension and a $250 civil penalty. (p. 126)
  3. The ALS notice takes effect 30 days after it is served, which is the date you received it. (p. 126)
  4. A first failure of an evidentiary test brings a 90-day administrative suspension, with no driving at all for the first 30 days. (p. 126)
  5. After a first-failure ALS ends, you must have an ignition interlock on any vehicle you drive for 1 year. (p. 126)
  6. A second test refusal within 10 years brings a 2-year absolute suspension, on top of any court penalty for DUI. (p. 127)
  7. A 1.5-ounce shot of 80-proof liquor, 5 ounces of wine and 12 ounces of beer each hold about the same amount of alcohol. (p. 129)
  8. Drivers 21 or older are considered to be driving under the influence at a BAC of 0.08 or more. (p. 131)
  9. Idaho sets a lower DUI limit of 0.04 for anyone operating a commercial vehicle. (p. 131)
  10. A first DUI conviction carries up to 6 months jail, a fine of up to $1,000, and a 90–180 day suspension. (p. 132)

Taken from the explanations to checked practice questions; page numbers link to the official handbook.

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Sample alcohol, drugs and dui questions

  1. 1.Which of these will sober up a person who has been drinking?

    • AExercising for 20 minutes
    • BEating a large meal
    • CDrinking strong black coffee
    • DWaiting for time to pass
    Show the answer

    ✓ D. Waiting for time to pass

    Once alcohol is in your bloodstream, nothing like coffee, exercise or food will sober you up. Only time works.

    Source: Idaho Driver's Handbook (July 2026), page 129

  2. 2.You refuse a BAC test for the first time, and the court upholds the officer's findings. How long is your license suspended?

    • A2 years
    • B6 months
    • C90 days
    • D1 year
    Show the answer

    ✓ D. 1 year

    For a first refusal, if the court upholds the officer's findings, your license is suspended for 1 year with no driving privileges of any kind.

    Source: Idaho Driver's Handbook (July 2026), page 126

  3. 3.Two weeks into a first-failure administrative license suspension, can you get any driving privileges?

    • AYes, if an interlock device is installed
    • BNo, the first 30 days allow no driving
    • CYes, with a licensed adult beside you
    • DYes, a permit for driving to work only
    Show the answer

    ✓ B. No, the first 30 days allow no driving

    During a first-failure ALS you have absolutely no driving privileges for the first 30 days of the 90-day suspension.

    Source: Idaho Driver's Handbook (July 2026), page 126

  4. 4.You fail an evidentiary test for the first time. How long is the administrative license suspension?

    • A1 year
    • B90 days
    • C30 days
    • D180 days
    Show the answer

    ✓ B. 90 days

    A first failure of an evidentiary test brings a 90-day administrative suspension, with no driving at all for the first 30 days.

    Source: Idaho Driver's Handbook (July 2026), page 126