Impaired Driving & Penalties — Louisiana
Louisiana CDL practice test: 410 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 | Louisiana CDL permit (CLP) knowledge tests |
| Topic questions | 13 (3% of 410 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. An alcohol evaporator is especially important:
- In cold weather. ✓
- In hot weather.
- In dry weather.
Answer: A. In cold weather.
An alcohol evaporator is especially important in cold weather. The handbook explains that certain air brake systems include an alcohol evaporator that adds alcohol to the air system. Its purpose is to lower the chance of ice forming in air brake valves and other parts when the weather is cold. The passage also says ice inside the system can make the brakes stop working. That supports the cold-weather choice, because the evaporator is described as protection against ice in air brake components.
2. 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.
3. When experiencing cold weather, be sure to check your vehicle's alcohol evaporator:
- Every three hours.
- Every day. ✓
- Every other week.
Answer: B. Every day.
4. The effects of alcohol are felt:
- With the first drink. ✓
- Only after several drinks have been consumed.
- At the legal limit.
Answer: A. With the first drink.
The effects of alcohol are felt with the first drink. The handbook ties alcohol's effects to drinking itself, not to a later threshold. It says alcohol changes human performance and that every driver is affected by drinking. It also describes early signs such as a mellow feeling and slight body warmth, followed by weaker coordination and judgment as blood alcohol rises. Nothing in the passages sets a minimum number of drinks before effects appear, and the legal limit is not described as the point where effects start. So the choice that fits the handbook is that the first drink is enough.
5. 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.
6. If feeling drowsy while driving, you should:
- Press on and finish the trip.
- Drive faster to reach your destination more quickly.
- Safely leave the road and take a nap. ✓
Answer: C. Safely leave the road and take a nap.
The correct move is to safely leave the road and take a nap. If you feel drowsy, the handbook's alertness guidance says to pull over and rest or nap. It also warns that trying to push on while tired is more dangerous than many drivers realize and is a major cause of fatal crashes. When fatigue signs appear, it tells you to stop and sleep for the night or take a short nap. That makes leaving the road safely the proper response.
7. Drowsy driving is most common during:
- The night. ✓
- The early morning.
- The mid-afternoon.
Answer: A. The night.
Drowsy driving is most common at night, so the correct choice is the one naming the night. The handbook says drowsy-driving crashes tend to happen when sleepiness is strongest, and it names the night and the mid-afternoon as those times. It then explains that most people are less alert at night, particularly after midnight, and that drivers who drive at night are much more likely to have fall-asleep crashes. That reasoning points to night as the time when drowsy driving is most common, which is what the question asks for.
8. What eliminates alcohol from the bloodstream?
- Coffee
- Exercise
- Time ✓
Answer: C. Time
Time is what eliminates alcohol from the bloodstream. The handbook explains that alcohol goes into the bloodstream and the liver processes it at a fixed rate—only one-third of an ounce per hour, less than a standard drink. Because that rate cannot be sped up, the passage says only time, not black coffee or a cold shower, will sober you up. That directly supports choosing time as what eliminates alcohol from the bloodstream.
9. If you are feeling tired and yawning a lot while you are driving, you should:
- Pull over and take a nap. ✓
- Get some coffee.
- Drive faster.
Answer: A. Pull over and take a nap.
You should pull over and take a nap. Yawning a lot is a sign of fatigue, and the handbook says to stop driving when you notice any sign of fatigue. It tells tired drivers to sleep for the night or take a short nap of about 15 to 20 minutes. The handbook also says forcing yourself to continue when tired is more dangerous than many people realize and is a major cause of deadly crashes. So the safe action is to get off the road and rest, not to keep driving.
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 · Verified from official source
Updated: · Based on the official driver handbook