DUI & Impaired Driving
BAC limits, implied consent, penalties, and impairment factors.
DUI & Impaired Driving rules in California follow the federal framework with state-specific limits, distances, and exceptions. The practice questions below are drawn from the California driver handbook, so they track the state's own rules.
DUI & Impaired Driving questions, California edition.
Each question links through to a full explanation, the rule it tests, and a citation back to the manual.
- You are 25 years old, driving your personal car, not driving a passenger for hire, and not on DUI probation. What is the lowest blood alcohol concentration (BAC) that makes it illegal for you to drive? →
- You are 19 years old and driving in California. At what blood alcohol concentration (BAC) or higher can you be charged with DUI? →
- You are driving a vehicle that requires a commercial driver's license. What is the commercial-driver BAC limit for a DUI charge in California? →
- A law enforcement officer suspects you of DUI and asks you to take a blood or urine test. You refuse. What will DMV do to your driving privilege? →
- You are driving your personal car with an unopened, sealed bottle of wine and an already-opened bottle of wine. Where must the opened bottle be stored? →
- You take a prescription medication before driving. It affects your ability to drive safely. Under California DUI law, which statement is true? →
- You are convicted of a DUI in California. How long will DMV suspend or revoke your driving privilege? →
- You are arrested for DUI. The officer takes your driver's license at the scene. What are you given in exchange? →
- For how many years does a California DUI conviction remain on your driving record? →
- You are 18 years old. A preliminary alcohol screening (PAS) shows your BAC is 0.05%. What can the officer require next? →
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