Topic 6 · Alcohol, Drugs, and Driving (DUI Laws)
Which can law enforcement use to detect drug impairment?
- Observations, field sobriety tests, drug influence evaluation — correct answer
- Only a breathalyzer
- Checking tire pressure
Why
Drugs do not show on a breath test, so officers rely on observations, field sobriety tests and a drug influence evaluation, backed by blood or urine.
Practise this in the real format
Reading one answer is not the same as sitting the test. The simulator runs the first-time adult form: 36 questions, 6 mistakes allowed, 83% to pass.
Source: California Driver's Handbook (DL 600, rev. 6/2025), the document the DMV writes the real test from. Edited by Fernando Aguilera. Aprobify is not affiliated with the California DMV.
More from Alcohol, Drugs, and Driving (DUI Laws)
- Which of the following is NOT a symptom of alcohol impairment?
- Can a driver under 21 carry alcohol in a vehicle if an adult is with them?
- If an officer observes slurred speech, red eyes, and smell of alcohol, what might they do?
- How might fatigue affect driving?
- Which group is at greater risk from alcohol due to lower body weight and experience?
- What happens if you are convicted of a second DUI offense in California?