Alcohol, Drugs & Impairment

Study questions with answers

10 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.

1. 1. After cannabis is smoked, how soon do its effects start and how long do they last?

   Correct answer: Within minutes, lasting about 2 to 4 hours

   Smoked cannabis usually takes effect within a few minutes and lasts about two to four hours.

   Source: MSF Motorcycle Operator Manual (18th ed.), Oklahoma edition — Cannabis and Motorcycle Operation

2. 2. If you wait one hour per drink before riding, what should you keep in mind?

   Correct answer: Some fatiguing after-effects may still remain

   Even after waiting an hour per drink, fatiguing after-effects of the alcohol may still linger.

   Source: MSF Motorcycle Operator Manual (18th ed.), Oklahoma edition — Being in Shape to Ride

3. 3. Which factor, more than any other, degrades a rider's ability to think and ride skillfully?

   Correct answer: Alcohol and other drugs

   Alcohol and other drugs harm clear thinking and skilled riding more than anything else.

   Source: MSF Motorcycle Operator Manual (18th ed.), Oklahoma edition — Alcohol and Drugs in Motorcycle Operation

4. 4. Roughly how many fatally injured motorcycle riders had a BAC above the legal limit?

   Correct answer: Nearly one-third

   Studies show nearly a third of fatally injured riders had blood alcohol above the legal limit.

   Source: MSF Motorcycle Operator Manual (18th ed.), Oklahoma edition — Why This Information Is Important

5. 5. Which ability does alcohol tend to affect first?

   Correct answer: Your judgment of how well you are riding

   One of the first things alcohol impairs is your own judgment of how well you are riding.

   Source: MSF Motorcycle Operator Manual (18th ed.), Oklahoma edition — Minimize the Risks

6. 6. Which three factors most affect your blood alcohol concentration?

   Correct answer: How much you drink, how fast you drink, and your body weight

   BAC is shaped mainly by how much you drink, how fast you drink, and your body weight.

   Source: MSF Motorcycle Operator Manual (18th ed.), Oklahoma edition — Alcohol in the Body

7. 7. A 12-ounce beer, a 5-ounce glass of wine, and a single shot of hard liquor contain what?

   Correct answer: About the same amount of alcohol

   These standard servings all hold about the same amount of alcohol.

   Source: MSF Motorcycle Operator Manual (18th ed.), Oklahoma edition — Alcohol in the Body

8. 8. How do the combined effects of alcohol and other drugs compare with either one alone?

   Correct answer: They are more dangerous than either one alone

   Mixing alcohol with other drugs is more dangerous than using either substance by itself.

   Source: MSF Motorcycle Operator Manual (18th ed.), Oklahoma edition — Alcohol and Drugs in Motorcycle Operation

9. 9. Why is cannabis especially risky for a motorcycle rider?

   Correct answer: It distorts your perception of time, space, and speed

   Cannabis distorts your sense of time, space, and speed, which riders must judge constantly.

   Source: MSF Motorcycle Operator Manual (18th ed.), Oklahoma edition — Cannabis and Motorcycle Operation

10. 10. About how fast can the body eliminate alcohol?

    Correct answer: About one drink per hour

    The body clears alcohol at a rate of roughly one drink per hour.

    Source: MSF Motorcycle Operator Manual (18th ed.), Oklahoma edition — Alcohol in the Body