Impaired Driving & Penalties — Utah
Utah CDL practice test: 477 free practice questions (Based on the official driver handbook). The official format is not yet verified; check the official site before your test. Impaired Driving & Penalties: 15 questions.
Blood alcohol limits, drugs and fatigue, licence suspensions, demerit points and fines.
This topic page is still being reviewed against the official handbook. Until review is finished it is hidden from search engines.
| Topic / Metric | Value |
|---|---|
| Topic | Impaired Driving & Penalties |
| License test | Utah CDL permit (CLP) knowledge tests |
| Topic questions | 15 (3% of 477 total) |
| Review status | This topic page is still being reviewed against the official handbook. Until review is finished it is hidden from search engines. |
Official handbook
Not yet verified
Advertisement
Questions (15)
1. A fatigued driver:
- Is extra alert.
- Should take over-the-counter remedies to wake them up.
- May make critical decisions too slowly. ✓
- Is usually more conscientious than a typical driver.
Answer: C. May make critical decisions too slowly.
A fatigued driver may make critical decisions too slowly. The handbook describes fatigue as physical or mental tiredness from strain, repetitive tasks, illness, or lack of sleep. It says fatigue impairs your vision and judgment much like alcohol and drugs, and that it affects your ability to make critical decisions. It also slows how quickly you see and react to hazards and makes you more likely to misjudge speed and distance. So a tired driver does not simply feel sleepy; the thinking behind driving choices gets worse.
2. Which of the following determines your blood alcohol concentration (BAC)?
- How much you drink ✓
- How frequently you drink
- The temperature of the drink
Answer: A. How much you drink
The amount you drink determines your blood alcohol concentration (BAC). Your blood alcohol concentration goes up with the amount of alcohol you drink. The handbook lists the amount consumed, how fast you drink, and your weight as the things that set BAC, with more alcohol producing a higher BAC. It also says the source of the alcohol does not matter, so whether it comes from beer, wine, or liquor, what counts is the alcohol itself. Nothing in the passages says the temperature of a drink changes BAC. That is why the amount you drink is the listed factor among these choices.
3. A second conviction of operating a CMV with a minimum blood alcohol concentration (BAC) of 0.04 percent will result in:
- The loss of your CDL for life. ✓
- The loss of your CDL for five years.
- The loss of your CDL for one year.
Answer: A. The loss of your CDL for life.
4. An open automobile window in cold weather may indicate that the driver is:
- Driving impaired. ✓
- Inappropriately dressed.
- Using the heat inside their vehicle.
- Enjoying the fresh air.
Answer: A. Driving impaired.
An open window in cold weather may mean the driver is driving impaired. The handbook puts an open window in cold weather in the same short list as speeding up or slowing down suddenly and driving too fast or too slow, right before it tells you to watch for drunk and sleepy drivers late at night. In that section the open window is treated as a clue about the driver's condition, not as a comfort choice, so the handbook answer is that it points to impairment. The passage does not explain the reason behind the clue, only that you should notice it.
5. Which of the following determines your blood alcohol concentration (BAC)?
- How much you drink ✓
- How frequently you drink
- The temperature of the drink
- The color of the drink
Answer: A. How much you drink
Your blood alcohol concentration is determined by how much you drink, along with how fast you drink and your weight. The handbook says BAC depends on the amount of alcohol consumed: more alcohol raises BAC. It also lists drinking speed and body weight as factors, because a smaller person can reach the same BAC with less alcohol. Among the choices, only the quantity you drink is one of those stated factors. The handbook does not list how often you drink, drink temperature, or drink color as things that set BAC.
6. Exercise will help a person sober up after drinking.
- True
- False ✓
Answer: B. False
False — exercise will not sober a person up after drinking; only time removes alcohol from the body. The handbook explains that alcohol goes into the bloodstream and is carried to the brain, and the liver clears it at a fixed rate of about one-third an ounce per hour — far less than a standard drink contains. Because that rate is fixed, the handbook says plainly that only time sobers you up, not black coffee or a cold shower. Exercise is the same kind of remedy as coffee or a cold shower: it does not speed up what the liver is doing, so it cannot make someone sober.
7. Which of the following is not a potential effect of drinking alcohol then driving?
- Improved reaction time ✓
- Driving too fast
- Driving in the incorrect lane
- Weaving while driving
Answer: A. Improved reaction time
Improved reaction time is not a potential effect of drinking alcohol; alcohol actually makes reaction time longer. The handbook says alcohol impairs judgment, vision, coordination, and reaction time, and it lists increased reaction time to hazards as a serious driving error. It also names driving too fast or too slow and driving in the wrong lane as errors alcohol can cause. Because alcohol makes reaction time longer, not shorter, improved reaction time is not one of its effects. That is why the choice about improved reaction time is the exception.
8. Frequent blinking may be a sign of fatigue.
- True ✓
- False
Answer: A. True
True — frequent blinking is listed among the warning signs of drowsiness and fatigue. The handbook lists fatigue warning signs under drowsiness prevention, and frequent blinking appears right alongside heavy eyelids and trouble focusing. Those are things a driver can notice in themselves before a crash happens. The same section says pushing on while tired is far more dangerous than most drivers think, and it tells you to stop and sleep for the night or take a 15–20 minute nap once you notice any sign of fatigue. So blinking is treated as a real warning sign, not a harmless habit.
9. Texting while driving a CMV is:
- Acceptable if the text is work-related.
- Acceptable if there are fewer than 10 words in the text message.
- Encouraged because it is safer than talking on the phone.
- Prohibited. ✓
Answer: D. Prohibited.
Texting while driving a CMV is prohibited. The handbook says federal rules prohibit CMV drivers from texting while operating in interstate commerce, and motor carriers may not require or allow it. It also treats texting as a serious distraction and says it is riskier than talking on a phone. The passages give only a narrow exception for contacting law enforcement or emergency services. They do not create exceptions for work-related messages or short messages, so the correct choice is that texting is prohibited.
10. Distracted driving can be avoided by:
- Pre-programming radio stations. ✓
- Smoking while driving.
- Eating while driving.
Answer: A. Pre-programming radio stations.
Pre-programming radio stations is a way to avoid distracted driving because it removes the need to adjust the radio while you are driving. The handbook tells drivers to set radio stations before they begin driving and to clear and secure the vehicle. It also says to avoid smoking, eating, and drinking while driving. Another passage lists adjusting the radio, eating, drinking, and smoking as activities inside the vehicle that can take your attention away from the driving task. Setting stations ahead of time means you are not fiddling with the radio once you are moving. The handbook warns that distracted driving can cause collisions with injury, death, or property damage.
Advertisement
Source
Last checked: 2026-10-17 · Verified from official source
Updated: · Based on the official driver handbook