Impaired Driving & Penalties — Indiana
Indiana CDL practice test: 431 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: 20 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 | Indiana CDL permit (CLP) knowledge tests |
| Topic questions | 20 (5% of 431 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 (20)
1. 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.
2. To prevent fatigue while driving, you should:
- Keep the cab warm.
- Keep the cab cool. ✓
- Keep the cab poorly ventilated.
- Close the vents.
Answer: B. Keep the cab cool.
Keep the cab cool — the handbook's alertness list says to keep cool by opening a window or running the air conditioner. The fatigue section of the handbook gives a short list of things you can do to stay alert behind the wheel, and one of those items is to keep cool by opening the window or using the air conditioner. That cooling advice sits right alongside other alertness habits such as wearing sunglasses against glare and eyestrain, taking periodic breaks, and stopping to rest or nap. Since the handbook names keeping cool as the way to help maintain alertness, keeping the cab cool is the choice that matches it.
3. In cold weather, an alcohol evaporator should be checked and filled:
- Once a week.
- Every day. ✓
- Every hour.
- Once a month.
Answer: B. Every day.
Check and fill the alcohol evaporator every day during cold weather. The handbook says some air brake systems use an alcohol evaporator to put alcohol into the air system, which helps lower the chance of ice forming in valves and other parts in cold weather. Ice in the system can stop the brakes from working. For that reason, the cold-weather instruction is to check the alcohol container and fill it as needed each day. Daily air tank drainage is still required unless the system has automatic drain valves.
4. If you’re feeling tired before a drive, you should:
- Drink coffee.
- Take caffeine pills.
- Not drive. ✓
- Drive as fast as possible so you get to the destination quickly.
Answer: C. Not drive.
You should not drive when you feel tired before a drive. The handbook lists fatigue as a serious risk and says that trying to push on while tired is more dangerous than most drivers realize; it is a major cause of fatal accidents. When you notice signs of fatigue, it tells you to stop driving and either sleep for the night or take a 15–20 minute nap. So the safe choice before a drive is to skip driving rather than try to manage the tiredness behind the wheel. The passage does not present coffee, caffeine pills, or speeding as remedies.
5. How can you avoid becoming drowsy on a trip?
- Get about three hours of sleep beforehand.
- Plan ahead, including stopping points. ✓
- Do not build exercise into your daily routine.
- Schedule the trip at night.
Answer: B. Plan ahead, including stopping points.
6. When driving, you should stop and take a break ____ to avoid becoming too tired.
- Every half hour
- Every hour
- Every two hours ✓
- Every six hours
Answer: C. Every two hours
You should stop and take a break about every two hours during a long trip to keep from getting too tired. The handbook's list of ways to stay alert on the road includes taking periodic breaks, and it puts the timing at roughly every 100 miles or 2 hours on long trips. The same section warns that trying to push on while tired is a major cause of fatal accidents, and it tells you to stop driving and rest or nap once you notice signs of fatigue. So the two-hour mark is the book's own break interval, not a guess.
7. Alcohol is removed from the body:
- At a rate that changes depending on how much alcohol is in the body.
- At a consistent rate, regardless of how much alcohol is in the body. ✓
- More quickly if the person drinks coffee.
- More quickly if the person stays awake.
Answer: B. At a consistent rate, regardless of how much alcohol is in the body.
Alcohol is removed at a consistent rate, regardless of how much alcohol is in the body. The handbook says the liver can process only a small, set amount of alcohol per hour, and it calls that a fixed rate. Because the rate stays the same, having more alcohol in the body does not make removal speed up. It also says only time will sober you up, so coffee or a cold shower does not change the rate. Drinking faster than the body clears alcohol just lets more build up.
8. Which of the following is not an example of a distracted person that motorists should be worried about?
- A person talking to another person in their vehicle
- A child on the side of the road
- A construction worker on the side of the road
- A person sitting on a bench waiting for a bus ✓
Answer: D. A person sitting on a bench waiting for a bus
9. What is the only way to sober up after drinking?
- Take a cold shower.
- Exercise.
- Wait. ✓
- Drink coffee.
Answer: C. Wait.
The only way to sober up is to wait — only time removes alcohol from your body. The handbook explains that alcohol moves into your bloodstream and is carried to the liver, and the liver works at a fixed rate, handling just one-third of an ounce per hour, which is less than the alcohol in a standard drink. Because that rate does not change, the handbook says plainly that only time, not black coffee or a cold shower, will sober you up. So the sobering happens on the body's schedule, and your job is simply to let the hours pass before you drive.
10. If you identify a distracted driver on the road, you should:
- Follow their vehicle closely.
- Try to get their attention.
- Give them plenty of room. ✓
- Flash your lights at them.
Answer: C. Give them plenty of room.
Give them plenty of room and keep your safe following distance. The handbook's section on watching out for distracted drivers says to give a distracted driver plenty of room and maintain your safe following distance. It also warns you to be very careful when passing, because the distracted driver may not know you are there and may drift in front of you. Keeping space around them means you have time to react if they drift over the lane divider, vary their speed, or move suddenly.
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Last checked: 2026-10-17 · Verified from official source
Updated: · Based on the official driver handbook