WA DMV Alcohol and Drug Impairment Laws 2

Question 1

In Washington, what is the legal blood alcohol concentration (BAC) limit for drivers under 21 years of age?

Accepted Answer

0.02

Answer

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?

Accepted Answer

5 nanograms per milliliter

Answer

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?

Accepted Answer

Your license is revoked and the refusal can be used against you in court

Answer

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?

Accepted Answer

Yes, if their driving ability is affected by alcohol or drugs

Answer

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?

Accepted Answer

0.04

Answer

Commercial drivers are held to a stricter 0.04 BAC limit while operating a commercial vehicle.

(WA DMV) Washington Department of Motor Vehicle Practice Test