Practice question

If you are driving a car and are 21 years of age or older, you are considered to be driving under the influence if your blood alcohol concentration (BAC) is:

  1. 0.02 percent or higher.
  2. 0.04 percent or higher.
  3. 0.06 percent or higher.
  4. 0.08 percent or higher.

Answer: D — 0.08 percent or higher.

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Practice more: 2026 Idaho Permit Test 23 →