California Car / Permit practice question · Alcohol & Drugs
For a driver 21 years or older, it is illegal to drive with a blood alcohol concentration (BAC) at or above:
Answer choices
- 0.05%
- 0.08%— Correct answer
- 0.10%
- 0.02%
Why this is the answer
If you are over 21, driving with a blood alcohol concentration of 0.08% or more is illegal. Lower numbers apply to drivers under 21, those on DUI probation, commercial drivers, and drivers carrying passengers for hire. You can also be convicted of DUI at a lower BAC, because impairment itself is what matters.
Source: California Driver Handbook — Alcohol and Drugs
Content reviewed against official driver handbooks · August 12, 2026
More Alcohol & Drugs questions
- According to the BAC table in the California handbook, what lowers your blood alcohol concentration after you drink?
- In California, it is illegal to have an open container of alcohol:
- Under California's "zero tolerance" law, a driver under 21 may not drive with a BAC at or above:
- By driving in California, you have already agreed ("implied consent") to:
- A driver transporting a passenger for hire, such as a rideshare or taxi passenger, may not drive with a BAC at or above: