Washington permit test: alcohol & drugs

BAC limits, implied consent, penalties, open containers and impairment. 8 questions.

Question 1 of 8
Alcohol & drugsWashington rule

For a driver 21 or older in Washington, what blood alcohol concentration (BAC) is considered a DUI?

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Sample alcohol & drugs questions

  1. For a driver 21 or older in Washington, what blood alcohol concentration (BAC) is considered a DUI?

    • A 0.08% or higher
    • B 0.10% or higher
    • C 0.02% or higher
    • D 0.05% or higher
    Show answer

    A. 0.08% or higher

    A BAC of 0.08% or more is a DUI for drivers 21 and older. You can still be impaired, and arrested, below that level, so the only safe choice is not to drink and drive.

    Source: Washington Driver Guide, page 37

  2. A 19-year-old driver is tested after a traffic stop. At what BAC does this driver face DUI-type consequences?

    • A 0.02%
    • B 0.08%
    • C 0.05%
    • D 0.10%
    Show answer

    A. 0.02%

    Drivers under 21 face DUI consequences at a BAC of just 0.02%. Because they cannot legally drink, the law treats almost any measurable alcohol as a violation.

    Source: Washington Driver Guide, page 37

  3. For drivers 21 and older, what level of active THC in the blood counts as a DUI in Washington?

    • A Any amount above zero
    • B 10 nanograms per milliliter or more
    • C 2 nanograms per milliliter or more
    • D 5 nanograms per milliliter or more
    Show answer

    D. 5 nanograms per milliliter or more

    For adults 21 and older, an active THC level of 5 nanograms per milliliter of blood or more is a DUI. Cannabis is legal at 21, but the guide warns there is no safe amount of cannabis for driving.

    Source: Washington Driver Guide, page 38

  4. What is the THC limit for drivers under 21 in Washington?

    • A More than 5 nanograms
    • B Anything more than 0 nanograms
    • C More than 2 nanograms
    • D More than 1 nanogram
    Show answer

    B. Anything more than 0 nanograms

    For drivers under 21, any active THC above 0 nanograms per milliliter of blood brings DUI consequences. This zero-tolerance rule matches the low 0.02% alcohol limit for young drivers.

    Source: Washington Driver Guide, page 37