Impaired Driving & Penalties — Iowa
Iowa CDL practice test: 408 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: 13 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 | Iowa CDL permit (CLP) knowledge tests |
| Topic questions | 13 (3% of 408 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
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Questions (13)
1. Texting while driving should:
- Only be done on straightaways.
- Only be done in curves.
- Not be done. ✓
Answer: C. Not be done.
Texting while driving should not be done at all, so the choice that says it should not be done is correct. The handbook prohibits texting by commercial motor vehicle drivers, and it notes that carriers may not require or allow drivers to text. It also explains why: texting pulls your eyes off the road, the odds of a safety-critical event are far higher for drivers who text, and a text takes your eyes away for several seconds, long enough to cover a lot of ground without looking. The rules also carry disqualification and civil penalties, with a narrow exception for contacting law enforcement or emergency services.
2. Distracted driving:
- Is not a concern.
- Only occurs as a result of people who are physically doing something while driving.
- Can occur as a result of mental activities, such as daydreaming. ✓
- Is encouraged on uncrowded roads.
Answer: C. Can occur as a result of mental activities, such as daydreaming.
Distracted driving can occur as a result of mental activities, such as daydreaming. The handbook lists daydreaming and being occupied with other mental distractions among the activities inside a vehicle that can distract your attention. It also describes mental distraction as activities that take your mind away from the road, such as talking with a passenger or thinking about something that happened during the day. So distraction is not limited to physical actions. The same section warns that distracted driving can cause collisions and put you, your passengers, other vehicles, and pedestrians in danger.
3. Alcohol evaporators are:
- Illegal.
- Used to introduce alcohol into air brake systems. ✓
- Only allowed in the northern parts of the state.
Answer: B. Used to introduce alcohol into air brake systems.
4. If you identify a distracted driver on the road, you should:
- Tailgate them.
- Flash your lights at them.
- Give them plenty of space. ✓
Answer: C. Give them plenty of space.
When you spot a distracted driver, give them plenty of space and keep your safe following distance. The handbook says you first need to recognize drivers who are distracted, then give them plenty of room while holding your normal safe following distance. It adds that you should be very careful when passing such a driver, because they may not notice you and may drift in front of you. That guidance points to putting distance between your vehicle and theirs, not staying close or trying to signal them.
5. 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.
6. If approaching a vehicle with a distracted driver, you should:
- Quickly pass the vehicle.
- Maintain a safe distance from the vehicle. ✓
- Closely follow the vehicle.
Answer: B. Maintain a safe distance from the vehicle.
When you approach a vehicle whose driver seems distracted, keep a safe distance back from it. The handbook tells you to give a distracted driver plenty of room and hold your normal safe following distance. It also warns that these drivers drift over lane lines or within their lane and run at inconsistent speeds, so staying back gives you room to see and react. The handbook adds that passing such a driver calls for extra care, because they may not notice you and may drift in front of you. Space is the protection it recommends, so holding a safe distance is the right choice.
7. Texting while driving is especially dangerous because:
- It is both a mental and physical distraction. ✓
- A message may be upsetting to the driver.
- People like to read and may become too engaged in their phones.
Answer: A. It is both a mental and physical distraction.
Texting while driving is especially dangerous because it is both a mental and physical distraction. The handbook says texting makes you look at a small screen and work the keypad with your hands. That takes your eyes and hands away from driving, while your mind is also busy with the message. The handbook calls this a physical and mental distraction happening at the same time. It also says texting is riskier than talking on a cell phone for this reason. That combination is what makes texting especially dangerous, so the answer that names both kinds of distraction fits the handbook.
8. Compared to talking on a cell phone while driving, texting while driving is:
- Much safer.
- Just as safe.
- More dangerous. ✓
Answer: C. More dangerous.
Texting while driving is more dangerous than talking on a cell phone. The handbook states that text messaging is even riskier than a phone conversation. It explains that texting pulls your eyes to a small screen and ties up your hands on the keypad, and it distracts you physically and mentally at the same time. That combination is why the handbook treats texting as the most alarming distraction. Talking on a phone can also distract you, but the passage puts texting in a higher-risk category, so the correct choice is the one saying it is more dangerous.
9. Texting while operating a CMV is:
- Illegal. ✓
- Acceptable on rural roads.
- Acceptable for drivers contacting their employers.
Answer: A. Illegal.
Texting while operating a CMV is illegal. The handbook's texting section says federal rules prohibit CMV drivers from texting while driving in interstate commerce, and it adds that motor carriers may not require or allow drivers to text. Another passage ties texting violations to CDL disqualification and civil penalties, with only an emergency exception for contacting law enforcement or emergency services. So texting is not permitted based on road type or because an employer wants contact. The answer is the choice saying it is illegal.
10. The only way to sober up after consuming alcohol is to:
- Take a cold shower.
- Exercise.
- Wait. ✓
Answer: C. Wait.
The only way to sober up is to wait — time is what clears alcohol from your body. The handbook explains that alcohol travels through the bloodstream to the brain and then to the liver, and the liver burns it off at a fixed rate of one-third of an ounce per hour. Because that rate cannot be sped up, the passage says plainly that only time will sober you up, and it names black coffee and a cold shower as things that will not. So sitting still and letting your body do its work is the only real option.
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Last checked: 2026-10-17 · Not yet verified
Updated: · Based on the official driver handbook