Alcohol & Drugs

Study questions with answers

8 sample Alcohol & Drugs questions with the correct answer, a short explanation, and the official handbook reference. Read through them, then take the quiz above.

1. 1. If you have two drinks within one hour, what is true at the end of that hour?

   Correct answer: At least one drink still remains in your system

   Because the body clears only about one drink per hour, after two drinks in an hour at least one drink still remains in your bloodstream.

   Source: Illinois Motorcycle Operator Manual — Alcohol and Other Drugs

2. 2. About how quickly does the body eliminate alcohol?

   Correct answer: About one drink per hour

   Alcohol leaves the body at a rate of roughly one drink per hour, so drinking faster than that lets it build up in your bloodstream.

   Source: Illinois Motorcycle Operator Manual — Alcohol and Other Drugs

3. 3. What is one of the best ways to keep a friend who has been drinking from riding?

   Correct answer: Arrange a safe alternative way for them to get home

   Arrange a safe ride by providing an alternative way home, and slow their drinking or keep them there until they are safe to travel.

   Source: Illinois Motorcycle Operator Manual — Alcohol and Other Drugs

4. 4. Does spacing your drinks to one per hour guarantee your riding skills are unaffected?

   Correct answer: No, effects from drinking may still remain

   Even pacing yourself to one drink per hour, alcohol can still accumulate and the effects of drinking may remain; your judgment is one of the first things impaired.

   Source: Illinois Motorcycle Operator Manual — Alcohol and Other Drugs

5. 5. Besides alcohol, what THC level in whole blood can make a driver legally under the influence in Illinois?

   Correct answer: 5 nanograms or more per milliliter

   You're considered under the influence with a THC reading at or above five nanograms in each milliliter of whole blood, among other thresholds.

   Source: Illinois Motorcycle Operator Manual — Alcohol and Other Drugs

6. 6. Among riders killed in motorcycle crashes who had been drinking, how many were over the legal limit?

   Correct answer: About one-third of them

   Nearly half of riders killed had been drinking, yet only about one-third of those had a BAC above the illegal limit; the rest were impaired by just a few drinks.

   Source: Illinois Motorcycle Operator Manual — Alcohol and Other Drugs

7. 7. In Illinois, what blood-alcohol concentration makes a driver legally under the influence?

   Correct answer: .08 or more

   A person is legally under the influence in Illinois at a BAC of .08 or more, though impairment starts well below that level.

   Source: Illinois Motorcycle Operator Manual — Alcohol and Other Drugs

8. 8. How much alcohol can begin to affect your riding performance?

   Correct answer: As little as one drink

   Even a single drink can noticeably degrade how you ride, and your judgment slips well before you reach the legal limit.

   Source: Illinois Motorcycle Operator Manual — Alcohol and Other Drugs