Arizona CDL — General Knowledge practice
Arizona CDL — General Knowledge: Alcohol & Drugs 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
13 questions · pass with 10 correct. You get instant feedback and an explanation after every answer.
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.
Show all 12 questions with answers
1. What is the manual's guidance about drugs that might mask tiredness while driving?
Correct answer: Avoid any drug that hides fatigue, since only rest cures it
No substance should be used to cover up fatigue; the sole remedy for being tired is sleep, so stay away from anything that only masks it.
Source: Arizona CDL Manual — Section 2: Driving Safely
2. When may a driver use a prescription drug and still operate a commercial vehicle?
Correct answer: Only if the doctor says it will not affect safe driving
A physician-prescribed medicine is allowed behind the wheel only if the doctor has confirmed it will not impair the driver's ability to operate safely.
Source: Arizona CDL Manual — Section 2: Driving Safely
3. At what blood alcohol concentration does it become illegal to operate a commercial motor vehicle?
Correct answer: 0.04% or more
The commercial threshold is half the common car limit — reaching a 0.04% concentration while driving a CMV is against the law.
Source: Arizona CDL Manual — Section 1: Introduction
4. For a first alcohol- or drug-related offense in a CMV, you lose your CDL for at least how long?
Correct answer: One year
A first violation such as driving with a 0.04% concentration or refusing a test costs you the CDL for a minimum of one year.
Source: Arizona CDL Manual — Section 1: Introduction
5. What happens to your CDL upon a second major alcohol or drug offense?
Correct answer: You lose it for life
A second qualifying offense results in a lifetime loss of the commercial license.
Source: Arizona CDL Manual — Section 1: Introduction
6. A driver found with a detectable alcohol level below 0.04% faces what consequence?
Correct answer: A 24-hour out-of-service order
Even a measurable amount under the 0.04% limit puts the driver out of service for a full 24 hours.
Source: Arizona CDL Manual — Section 1: Introduction
7. About how much alcohol can the liver clear from the body in one hour?
Correct answer: Roughly one-third of an ounce
The liver removes alcohol at a fixed pace of roughly a third of an ounce per hour, which is less than one standard drink holds.
Source: Arizona CDL Manual — Section 2: Driving Safely
8. Which factors combine to set a person's blood alcohol concentration?
Correct answer: How much you drink, how fast, and your body weight
BAC rises with the amount consumed and the speed of drinking, and it climbs faster in a lighter person than in a heavier one.
Source: Arizona CDL Manual — Section 2: Driving Safely
9. What is the only thing that will actually reduce a person's blood alcohol level?
Correct answer: The simple passage of time
Because the body processes alcohol at a set rate, nothing but waiting will lower your concentration — coffee and cold water do not help.
Source: Arizona CDL Manual — Section 2: Driving Safely
10. By operating a commercial vehicle, what have you agreed to regarding alcohol testing?
Correct answer: That you have consented to be tested
Driving a CMV counts as giving your consent to alcohol testing; a refusal to submit is treated as a serious offense on its own.
Source: Arizona CDL Manual — Section 1: Introduction
11. If a first alcohol offense happens while you are hauling placarded hazardous materials, the minimum CDL loss rises to how long?
Correct answer: Three years
Carrying placarded hazmat at the time of a first offense stretches the minimum disqualification from one year up to three years.
Source: Arizona CDL Manual — Section 1: Introduction
12. As alcohol enters the bloodstream, which mental ability is impaired first?
Correct answer: Judgment and self-control
Alcohol strikes the judgment-and-self-control center of the brain first, which is dangerous because it can keep a drinker from realizing they are impaired.
Source: Arizona CDL Manual — Section 2: Driving Safely
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Every Arizona question is written from the official Arizona driver handbook and checked against its current edition. DMV Test Free is a free, independent study resource — not affiliated with any DMV or government agency. About DMV Test Free