Washington State Knowledge Test Alcohol, Drugs, and Driving 1 — Questions and Answers
Question 1: How does alcohol affect a driver's reaction time in Washington?
- It improves reaction time by reducing anxiety
- It slows reaction time significantly (Correct answer)
- It has no effect until BAC reaches 0.08%
- It only affects reaction time in new drivers
Correct answer: It slows reaction time significantly
Alcohol slows reaction time even at low blood alcohol concentrations, increasing the distance traveled before a driver responds to a hazard.
Question 2: Which of the following is the only way to sober up after drinking alcohol?
- Drinking coffee
- Eating food
- Exercising
- Time (Correct answer)
Correct answer: Time
Only time allows the body to metabolize alcohol; coffee, food, and exercise do not speed up the process.
Question 3: In Washington, refusing a breath test after a DUI arrest results in:
- No additional penalty beyond the DUI charge
- Automatic license revocation for at least one year (Correct answer)
- A fine only, with no license consequences
- The DUI charge being dropped
Correct answer: Automatic license revocation for at least one year
Under Washington's implied consent law, refusing a breath or blood test after a DUI arrest results in an automatic license revocation of at least one year.
Question 4: What effect does marijuana have on driving ability in Washington?
- It has no significant effect at low doses
- It impairs judgment, coordination, and reaction time (Correct answer)
- It improves focus for routine driving tasks
- Only affects driving if combined with alcohol
Correct answer: It impairs judgment, coordination, and reaction time
Marijuana impairs judgment, slows reaction time, and affects coordination, making driving dangerous regardless of the legal status of the substance.
Question 5: Washington's THC legal limit for drivers 21 and older is:
- 2 ng/mL
- 5 ng/mL (Correct answer)
- 10 ng/mL
- There is no specific limit
Correct answer: 5 ng/mL
Washington State sets a legal THC per se limit of 5 nanograms per milliliter of blood for drivers 21 and older.
Question 6: Prescription medications can affect driving by:
- Having no effect if taken as prescribed
- Causing drowsiness, impaired judgment, or slowed reactions (Correct answer)
- Being legal, meaning driving is always permitted
- Only affecting driving if mixed with alcohol
Correct answer: Causing drowsiness, impaired judgment, or slowed reactions
Many prescription medications cause side effects such as drowsiness or impaired judgment that can make driving dangerous even when taken as directed.
Washington State Knowledge Test Alcohol, Drugs, and Driving 1
How does alcohol affect a driver's reaction time in Washington?