Wyoming CDL — General Knowledge practice
Wyoming 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.
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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.
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1. A CDL holder already served a one-year loss of the CDL after an alcohol violation in a personal vehicle. The driver is later convicted of a second such violation, this time in a CMV. What does Section 1 say?
Correct answer: The CDL is lost for life
A second conviction costs the CDL for life, and the manual says this is so whether the second violation happens in a personal vehicle or in a CMV.
Source: Wyoming Commercial Driver License Manual — Section 1.3.7, Traffic Violations in your Personal Vehicle
2. A CDL holder's privilege to drive a personal vehicle is suspended because of an alcohol violation. What happens to the CDL?
Correct answer: It is lost for 1 year
When the personal-vehicle privilege is revoked, cancelled or suspended for alcohol, controlled substance or felony violations, the driver loses the CDL for 1 year.
Source: Wyoming Commercial Driver License Manual — Section 1.3.7, Traffic Violations in your Personal Vehicle
3. What does the manual say about trying to 'push on' when you are tired?
Correct answer: Most drivers underestimate how dangerous it is; the manual calls it a major cause of fatal accidents
The manual warns that pushing on while tired is much more dangerous than drivers tend to believe and names it as a major cause of fatal accidents. At the first signs of fatigue you should stop driving.
Source: Wyoming Commercial Driver License Manual — Section 2.11.2, Driver Factors
4. What does the manual's list for maintaining alertness say about using drugs to stay awake?
Correct answer: They might hold off sleep briefly, but they do not make you alert
The advice is to avoid drugs: they can keep a driver awake for a time without making that driver alert. The only safe cure for drowsiness is getting off the road and sleeping.
Source: Wyoming Commercial Driver License Manual — Section 2.11.2, Driver Factors
5. Which of these is among the manual's ways of preventing drowsiness before a trip?
Correct answer: Building exercise into your daily life for more energy
The before-a-trip list includes getting adequate sleep, driving with a passenger, avoiding medications that cause drowsiness, and incorporating exercise into daily life to gain energy.
Source: Wyoming Commercial Driver License Manual — Section 2.11.2, Driver Factors
6. Research cited in the manual identifies groups at increased risk of a fall-asleep crash. Which of these is one of them?
Correct answer: People with untreated sleep disorders
The groups named are young males, shift workers, commercial drivers (long-haul drivers especially), plus anyone with an untreated sleep disorder or with sleep deprivation, whether short-term or chronic.
Source: Wyoming Commercial Driver License Manual — Section 2.11.2, Driver Factors
7. Which of these is on the manual's list of ways to maintain alertness while driving?
Correct answer: Avoid heavy foods
The alertness list includes avoiding heavy foods, along with keeping cool by opening a window or running the air conditioner and taking periodic breaks.
Source: Wyoming Commercial Driver License Manual — Section 2.11.2, Driver Factors
8. On the manual's table of BAC effects, which level is labeled the drunk driving limit?
Correct answer: .08
The table lists .08 as the drunk driving limit, with definite impairment of coordination and judgment at that level.
Source: Wyoming Commercial Driver License Manual — Section 2.22.1, Alcohol and Driving
9. Section 1 lists two separate alcohol-related driving offenses that each cost the CDL for a year on a first offense. How do they differ?
Correct answer: One is driving a CMV at a BAC of .04 percent or higher; the other is driving any motor vehicle under the influence of alcohol
The list names driving a CMV with a blood alcohol concentration of .04 percent or more, and separately names alcohol-impaired driving of a motor vehicle, with no BAC figure attached.
Source: Wyoming Commercial Driver License Manual — Section 1.3.2, Alcohol, Leaving the Scene of an Accident, and Commission of a Felony
10. Wyoming's list of people who cannot get a CDL includes which of these?
Correct answer: A person who habitually uses alcohol or a controlled substance
Along with people under 18 and those whose driving privileges are suspended or revoked, the list bars anyone who habitually uses alcohol or any controlled substance.
Source: Wyoming Commercial Driver License Manual — Wyoming Specific CDL Information, Who Cannot Get a Wyoming CDL?
11. Which first offense costs a driver the CDL for at least one year even though no alcohol reading is ever recorded?
Correct answer: Refusing to undergo blood alcohol testing
Refusing the blood alcohol test is itself on the list of first offenses that bring a loss of the CDL for a minimum of one year.
Source: Wyoming Commercial Driver License Manual — Section 1.3.2, Alcohol, Leaving the Scene of an Accident, and Commission of a Felony
12. The manual defines fatigue as physical or mental tiredness. Which set of causes does it give?
Correct answer: Strain of body or mind, doing the same task over and over, being ill, or too little sleep
Fatigue is described as tiredness that can come from physical or mental strain, from repetitive tasks, from illness or from a lack of sleep. Like alcohol and drugs, it impairs vision and judgment.
Source: Wyoming Commercial Driver License Manual — Section 2.11.2, Driver Factors
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