WA DMV Alcohol and Drug Impairment Laws 2 — Questions and Answers
Question 1: In Washington, what is the legal blood alcohol concentration (BAC) limit for drivers under 21 years of age?
- 0.04
- 0.08
- 0.00
- 0.02 (Correct answer)
Correct answer: 0.02
Washington's zero-tolerance law makes it illegal for drivers under 21 to drive with a BAC of 0.02 or higher.
Question 2: What is the legal per se limit for THC concentration in a driver's blood in Washington?
- There is no THC limit in Washington
- 10 nanograms per milliliter
- 5 nanograms per milliliter (Correct answer)
- 1 nanogram per milliliter
Correct answer: 5 nanograms per milliliter
Washington law sets a per se DUI limit of 5 nanograms of THC per milliliter of blood for drivers 21 and over.
Question 3: Under Washington's implied consent law, what happens if you refuse a breath test after a lawful DUI arrest?
- Nothing happens if you were not actually impaired
- You are automatically found not guilty
- You receive only a small fine
- Your license is revoked and the refusal can be used against you in court (Correct answer)
Correct answer: Your license is revoked and the refusal can be used against you in court
Refusing a lawful breath test results in license revocation for at least one year and the refusal may be used as evidence in court.
Question 4: A driver is stopped and has a BAC of 0.06. Can they still be arrested for DUI in Washington?
- No, because they are under the 0.08 limit
- Only if they are under 21
- Yes, if their driving ability is affected by alcohol or drugs (Correct answer)
- Only if they were in a crash
Correct answer: Yes, if their driving ability is affected by alcohol or drugs
You can be convicted of DUI below 0.08 if evidence shows your ability to drive was affected by alcohol or drugs.
Question 5: What is the BAC limit for drivers operating a commercial motor vehicle in Washington?
- 0.08
- 0.02
- 0.05
- 0.04 (Correct answer)
Correct answer: 0.04
Commercial drivers are held to a stricter 0.04 BAC limit while operating a commercial vehicle.
Question 6: Which of the following affects how quickly alcohol impairs a driver?
- Only the type of alcohol consumed
- The driver's years of driving experience
- Drinking coffee immediately afterward
- Body weight, food eaten, and how fast the drinks were consumed (Correct answer)
Correct answer: Body weight, food eaten, and how fast the drinks were consumed
Impairment depends on factors like body weight, food in the stomach, and drinking speed, not on tolerance tricks.
Question 7: Which statement about prescription medications and driving in Washington is true?
- Only illegal drugs count toward a DUI charge
- Prescription drugs can never lead to a DUI
- You can be arrested for DUI even if the impairing drug was legally prescribed (Correct answer)
- A prescription is a complete legal defense to DUI
Correct answer: You can be arrested for DUI even if the impairing drug was legally prescribed
Driving while impaired by any drug, including legally prescribed medication, can result in a DUI arrest.
WA DMV Alcohol and Drug Impairment Laws 2
In Washington, what is the legal blood alcohol concentration (BAC) limit for drivers under 21 years of age?