Washington Motorcycle practice
Washington Motorcycle: Alcohol, Drugs & Impairment 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
15 questions · pass with 12 correct. You get instant feedback and an explanation after every answer.
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Study questions with answers
12 sample Alcohol, Drugs & Impairment questions with the correct answer, a short explanation, and the official handbook reference. Read through them, then take the quiz above.
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1. How can common over-the-counter cold or allergy medicines affect riding ability?
Correct answer: They can impair riding as much as alcohol and illegal drugs
Taken by themselves, cold or allergy medicines can hurt your riding every bit as much as alcohol or illegal drugs do.
Source: Washington Motorcycle Operator's Manual — Impairments: Alcohol and Drugs
2. On average, how long does it take the body to process one drink of alcohol?
Correct answer: About one hour
It takes an average of about one hour for the body to clear one drink from your system.
Source: Washington Motorcycle Operator's Manual — Impairments: Alcohol and Drugs
3. What is the only thing that can remove alcohol and its effects from your body?
Correct answer: The passage of time
Only time removes alcohol from your system; coffee, food, and cold showers do not speed up the process.
Source: Washington Motorcycle Operator's Manual — Impairments: Alcohol and Drugs
4. As a consequence of an impaired-riding conviction, community service may include serving how long in a sobriety program?
Correct answer: Up to 90 days
Community service may mean as many as 90 days in a sobriety program, or duties like clearing litter from the highway.
Source: Washington Motorcycle Operator's Manual — Impairments: Consequences of Conviction
5. How does marijuana affect a rider's abilities?
Correct answer: It slows reactions, reduces concentration, and distorts time and distance
Marijuana slows reactions, hurts concentration, and distorts your sense of time and distance, especially when reacting to the unexpected.
Source: Washington Motorcycle Operator's Manual — Impairments: Marijuana
6. In Washington, which substance ranks among the most frequent factors in motorcycle crashes and deaths?
Correct answer: Alcohol
Alcohol is among the most common factors in the state's motorcycle crashes and deaths.
Source: Washington Motorcycle Operator's Manual — Impairments: Alcohol and Drugs
7. What choice does the manual say a responsible rider makes about alcohol?
Correct answer: They choose either to drink or to ride, not both
Responsible riders choose either to drink or to ride, never both, because alcohol and riding is a dangerous combination.
Source: Washington Motorcycle Operator's Manual — Impairments: Alcohol and Drugs
8. Beginning at what point does alcohol start to degrade a rider's judgment, eyesight, focus, and fine-motor control?
Correct answer: Beginning with the first drink
Alcohol impairs judgment, vision, attention, and fine-motor skills beginning with the very first drink.
Source: Washington Motorcycle Operator's Manual — Impairments: Alcohol and Drugs
9. Which of the following equals one standard drink?
Correct answer: A 5-ounce glass of wine
One drink is considered a 12-ounce beer, a 5-ounce glass of wine, or 1.5 ounces of hard liquor.
Source: Washington Motorcycle Operator's Manual — Impairments: Alcohol and Drugs
10. What lower BAC limit applies to riders under the age of 21 in Washington?
Correct answer: 0.02%
For riders under 21, a lower BAC limit of 0.02% applies.
Source: Washington Motorcycle Operator's Manual — Impairments: Alcohol and the Law
11. For a person over 21 in Washington, what blood THC concentration is the threshold for being considered impaired?
Correct answer: 5 nanograms
For someone over 21, a blood THC concentration of 5 nanograms is the level considered impaired in Washington.
Source: Washington Motorcycle Operator's Manual — Impairments: Marijuana
12. Which penalty may follow a conviction for riding under the influence in Washington?
Correct answer: A mandatory license suspension
A conviction can bring a mandatory license suspension, along with fines, community service, and various costs.
Source: Washington Motorcycle Operator's Manual — Impairments: Consequences of Conviction
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