In Oregon, what blood alcohol concentration (BAC) creates a legal presumption that an adult driver (21 or older) is impaired?
-
A.
0.10%.
-
B.
0.15%.
-
C.
0.08%. Correct
-
D.
0.05%.
The answer is "0.08%."
Oregon law presumes an adult driver is impaired at a BAC of 0.08% or more, and you can still be arrested below 0.08% if other evidence shows impairment. Test-takers who pick 0.10% are recalling the older nationwide limit most states used before lowering it to 0.08%.
The traps in the wrong answers
A. 0.10%.
Oregon's per-se BAC threshold for adult drivers is 0.08%, not 0.10%. This answer recalls the older nationwide 0.10% limit most states used before lowering it to 0.08%.
B. 0.15%.
Oregon's baseline per-se BAC threshold for adults is 0.08%, not 0.15%. This answer confuses an aggravated-DUI or enhanced-penalty BAC used in other states with Oregon's basic per-se limit.
D. 0.05%.
Oregon's per-se BAC threshold for adult drivers is 0.08%, not 0.05%. This answer recalls the 0.05% advisory limit some safety groups have proposed and that several other countries use.
This question tests your knowledge of DUI & Impaired Driving in Oregon. Source: Oregon Driver Manual, "Impaired Driving," p.82..
Related Oregon questions
- You're 19 years old and driving in Oregon. What blood alcohol concentration will cause you to fail an Oregon BAC test? →
- Under Oregon's open container law, where in your vehicle may an open container of alcohol be carried? →
- What does Oregon's Implied Consent law require? →
- An Oregon officer pulls you over and observes signs of impairment. Your breath test comes back at 0.06% BAC. Can you still be arrested for DUII? →
- You took a prescribed medication in Oregon and feel groggy. Which statement about Oregon's DUII law is correct? →
You just took one Oregon question apart. The book does it for the whole test.
The Oregon book unlocks a free companion: an adaptive study plan, progress synced across your devices, a denser laminate cheat sheet, and a test-day walkthrough. Verify your copy once, usually in seconds; there's nothing extra to buy.
$18.99 paperback, free companion included.