Alcohol & Drugs

Study questions with answers

12 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. By holding a CDL and operating a commercial vehicle, a driver is treated as having consented to:

   Correct answer: testing of blood, breath, or urine for alcohol or drugs

   Under implied consent, a CDL holder is deemed to consent to testing of blood, breath, or urine for alcohol or drugs.

   Source: KY CDL Manual, Implied Consent

2. 2. Federal rules on drug use for commercial drivers:

   Correct answer: prohibit being under the influence of any controlled substance on duty

   The rules forbid possession or use of many drugs on duty and being under the influence of any controlled substance that can make a driver unsafe.

   Source: KY CDL Manual, Sec 2.22 Other Drugs

3. 3. A commercial driver faces a one-year disqualification, on a first offense, for driving a CMV with a blood alcohol concentration of:

   Correct answer: .04% or higher

   It is illegal to operate a CMV with a BAC of .04% or more, and a first offense costs your CDL for at least one year.

   Source: KY CDL Manual, Sec 1.3 Alcohol Disqualifications

4. 4. As blood alcohol builds up, the first part of the brain it affects controls:

   Correct answer: judgment and self-control

   Alcohol first affects judgment and self-control, which can keep drinkers from realizing they are becoming drunk.

   Source: KY CDL Manual, Sec 2.22 Alcohol and the Brain

5. 5. About how much alcohol can the liver process in one hour?

   Correct answer: Roughly one-third of an ounce

   The liver handles only about one-third of an ounce of alcohol per hour, less than a standard drink, so only time sobers you up.

   Source: KY CDL Manual, Sec 2.22 How Alcohol Works

6. 6. A driver found with any detectable amount of alcohol below .04% will be:

   Correct answer: put out of service for 24 hours

   You will be placed out of service for 24 hours if you have any detectable amount of alcohol under .04%.

   Source: KY CDL Manual, Sec 1.3 Alcohol Disqualifications

7. 7. Which of the following will actually lower your blood alcohol concentration?

   Correct answer: Letting time pass

   Only the passage of time lets the body remove alcohol; coffee, a cold shower, or fresh air will not sober you up.

   Source: KY CDL Manual, Sec 2.22 How Alcohol Works

8. 8. A prescription drug given by a doctor may be used while driving only if:

   Correct answer: the doctor says it will not affect safe driving

   Use of a doctor-prescribed drug is permitted only if the doctor informs the driver that it will not affect safe-driving ability.

   Source: KY CDL Manual, Sec 2.22 Other Drugs

9. 9. Combining alcohol with other drugs can:

   Correct answer: make the effects of the other drugs much worse

   Alcohol can make the effects of other drugs much worse, so the safest rule is not to mix drugs with driving at all.

   Source: KY CDL Manual, Sec 2.22 Other Drugs

10. 10. A second conviction for driving a CMV under the influence of alcohol results in:

    Correct answer: loss of the CDL for life

    A second offense of the major alcohol-related violations disqualifies a commercial driver for life.

    Source: KY CDL Manual, Sec 1.3 Alcohol Disqualifications

11. 11. Which of these contains about the same amount of alcohol as a 12-ounce glass of 5% beer?

    Correct answer: A 1.5-ounce shot of 80-proof liquor

    A 12-ounce beer, a 5-ounce glass of 12% wine, and a 1.5-ounce shot of 80-proof liquor all hold the same amount of alcohol.

    Source: KY CDL Manual, Sec 2.22 What Is a Drink

12. 12. Refusing to submit to a blood, breath, or urine test when stopped for probable cause leads to:

    Correct answer: loss of the CDL for at least one year on a first offense

    Refusing testing when lawfully requested is treated like the alcohol offenses, costing the CDL for at least one year on a first offense.

    Source: KY CDL Manual, Sec 1.3 Alcohol Disqualifications