Oregon Car / Permit practice
Oregon Car / Permit: Alcohol & Drugs practice test
Blood alcohol limits, zero-tolerance and implied-consent laws, and how alcohol and drugs — legal or not — affect your driving.
Content reviewed against official driver handbooks · August 12, 2026
13 questions · pass with 10 correct. You get instant feedback and an explanation after every answer.
Study questions with answers
12 sample Alcohol & Drugs questions with the correct answer, a short explanation, and the official handbook reference. Read through them, then take the quiz above.
Show all 12 questions with answers
1. What does Oregon's Implied Consent law mean?
Correct answer: By driving, you consent to breath, blood, or urine testing at an officer's request
Under Implied Consent, operating a vehicle means you have agreed to submit to chemical testing when a police officer asks.
Source: Oregon Driver Manual — Impaired Driving, p. 83
2. What is the safest choice after using any drug that affects your reaction time?
Correct answer: Do not drive at all
The safest choice is to avoid driving after using any drug that affects your reaction time or physical ability.
Source: Oregon Driver Manual — Impaired Driving, p. 82
3. Which drug is most commonly involved when drivers are impaired in Oregon?
Correct answer: Alcohol
Alcohol is the most common drug involved in impaired driving, though marijuana also contributes to many crashes.
Source: Oregon Driver Manual — Impaired Driving, p. 82
4. At what blood alcohol concentration does Oregon law presume a driver 21 or older is impaired?
Correct answer: 0.08% or more
A BAC of 0.08% or more leads the law to presume impairment, though you can be arrested at a lower level too.
Source: Oregon Driver Manual — Impaired Driving, p. 82
5. Oregon's DUII law applies to which substances?
Correct answer: Any substance that impairs your ability to drive
The DUII law covers any substance, legal or not, that impairs your mental or physical ability to drive.
Source: Oregon Driver Manual — Impaired Driving, p. 83
6. Which statement about prescription or over-the-counter medications and driving is true?
Correct answer: They can impair driving, so ask a doctor or pharmacist about side effects
OTC and prescription medications can impair driving; check with a doctor or pharmacist about side effects before driving.
Source: Oregon Driver Manual — Impaired Driving, p. 83
7. When is a container of alcohol considered 'open' under the law?
Correct answer: When its seal has been broken, even if reclosed
A container counts as open once its seal has been broken, even if it was closed again.
Source: Oregon Driver Manual — Impaired Driving (Open Container), p. 83
8. Which of these can cause you to lose your Oregon driving privilege?
Correct answer: Driving under the influence of alcohol, drugs, or inhalants
Driving under the influence of alcohol, drugs, or inhalants is one of the listed reasons a driver can lose their driving privilege.
Source: Oregon Driver Manual — Loss of Driving Privileges, p. 95
9. Can a driver be arrested for DUII with a BAC under 0.08%?
Correct answer: Yes, if alcohol or drugs are affecting your driving
You can still be arrested for DUII even with a BAC below 0.08% if you are impaired by alcohol or drugs.
Source: Oregon Driver Manual — Impaired Driving, p. 82
10. Under Oregon's zero-tolerance law, a driver under 21 fails the test at what alcohol level?
Correct answer: Any detectable amount
Drivers under 21 fail the test with any amount of alcohol in their blood under Oregon's zero-tolerance law.
Source: Oregon Driver Manual — Impaired Driving, p. 83
11. Oregon's Open Container law requires open alcohol containers to be kept where?
Correct answer: In the trunk
Any open bottle or container of alcohol must be stored in the trunk; it is otherwise illegal to have it in the vehicle on a road.
Source: Oregon Driver Manual — Impaired Driving (Open Container), p. 83
12. How does combining alcohol and marijuana affect driving?
Correct answer: It can reduce a person's ability to drive safely
Using alcohol and marijuana together can lower a driver's ability to operate a vehicle safely.
Source: Oregon Driver Manual — Impaired Driving, p. 82
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