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California DMV Drug & Alcohol Test
Alcohol and drug questions are guaranteed on the California written test. Learn the limits and penalties, then practice the exact questions.
Start the Drug & Alcohol practice test →Key alcohol & drug facts to know
- Legal BAC limit, age 21+
- 0.08%
- Commercial drivers
- 0.04%
- Under 21 (zero tolerance)
- 0.01%
- Refusing a chemical test
- Automatic license suspension (implied consent)
- Open container
- Illegal anywhere in the passenger area
- Prescription / OTC drugs
- Can impair you — driving while impaired is still a DUI
- First DUI conviction
- Fines, license suspension, possible jail, and a DUI program
Ready to practice?
Test yourself on these exact rules with instant feedback.
Start the Drug & Alcohol practice test →Frequently Asked Questions
What is the legal blood alcohol limit in California?▾
It is 0.08% for drivers 21 and older, 0.04% for commercial drivers, and 0.01% for anyone under 21 (zero tolerance). You can still be arrested below these limits if you are impaired.
What is implied consent?▾
By driving in California you agree to take a breath or blood test if lawfully arrested for DUI. Refusing triggers an automatic license suspension and can add penalties on top of the DUI itself.
Do alcohol and drug questions really appear on the DMV test?▾
Yes — DUI, BAC limits, and how alcohol and drugs affect driving are a standard part of the California knowledge test. Expect a few of these questions every time.