Impaired Driving & Penalties — Illinois
Illinois CDL practice test: 447 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 | Illinois CDL permit (CLP) knowledge tests |
| Topic questions | 20 (4% of 447 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
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Questions (20)
1. If a driver begins to feel fatigued while driving, they should:
- Continue driving.
- Drink coffee.
- Stop and rest. ✓
- Drive faster to finish the trip more quickly.
Answer: C. Stop and rest.
If you begin to feel fatigued while driving, you should stop and rest. The handbook's fatigue section says that when you feel tired, you should stop driving and get some rest or take a nap. It also says caffeine can increase awareness for only a few hours, then wears off, so you should not rely on it to prevent fatigue. The signs of fatigue should tell you to stop and rest. That supports stopping to rest rather than continuing, using coffee, or trying to finish faster.
2. A distracted driver:
- Usually reacts well to hazards.
- Usually has slowed perception. ✓
- Is usually aware of what is happening around them.
- Is a good person to follow.
Answer: B. Usually has slowed perception.
A distracted driver usually has slowed perception, so they may notice hazards late or miss them entirely. The handbook lists slowed perception as an effect of distracted driving. It says this can delay you in perceiving an important traffic event or make you fail to perceive it at all. The same section also mentions delayed decision making and improper action, which means distraction affects how you take in and respond to what is happening. Because the handbook ties distracted driving to slowed perception and increased risk, the answer that says perception is usually slowed fits directly.
3. How could you reduce your stress while driving?
- Drink a caffeinated beverage
- Talk on your cell phone
- Gesture at other drivers
- Listen to calming music ✓
Answer: D. Listen to calming music
Listening to calming music, such as easy listening, is a way to reduce your stress while driving. The handbook's section on not being an aggressive driver tells you to reduce stress before and while you drive, and one of its listed steps is to listen to easy listening music. The same passage pairs this with giving the drive your full attention and not letting cell phone talk or eating distract you. So calming music is the stress-reducer the handbook names, while the other choices either add distraction or make things worse.
4. 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.
5. 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.
6. Sending text messages while driving:
- May be done if the messages are short.
- Is encouraged.
- Is permitted if you are asking a question of your employer.
- Is not permitted. ✓
Answer: D. Is not permitted.
Sending text messages while driving is not permitted. The handbook states plainly that you may not send or read text messages while driving. It treats texting as a serious distraction: you take your eyes off the road to look at a screen and use your hands, and the risk of a safety-critical event rises sharply. The rule is written as a flat prohibition, not as something that depends on message length or who the message is for. That is why the correct choice is that texting is not permitted.
7. Of the following, which is not a way to prevent drowsiness during a trip?
- Getting an adequate amount of sleep before driving
- Traveling with a passenger
- Scheduling trips during hours when you would not normally be awake ✓
- Avoiding medications that may cause drowsiness
Answer: C. Scheduling trips during hours when you would not normally be awake
Scheduling trips during hours when you would not normally be awake is not a way to prevent drowsiness — it actually raises your risk. The handbook lists driving at night, mid-afternoon, or when you would normally be asleep as a cause of drowsy driving, and notes many heavy motor vehicle accidents happen between midnight and 6 a.m. Its advice for preventing drowsiness before a trip is the opposite: plan your driving for the hours you are normally awake, not the middle of the night. Choosing to drive when your body expects sleep works against you rather than protecting you.
8. 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.
9. About how many drinks does it take for a 200-pound person to reach a 0.02 percent blood alcohol concentration (BAC)?
- One ✓
- Two
- Three
- Four
Answer: A. One
10. 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.
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Last checked: 2026-10-17 · Verified from official source
Updated: · Based on the official driver handbook