Impaired Driving & Penalties — Oklahoma
Oklahoma CDL practice test: 421 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 | Oklahoma CDL permit (CLP) knowledge tests |
| Topic questions | 15 (4% of 421 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 (15)
1. 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.
2. 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.
3. One way to prevent fatigue on long trips is to:
- Take frequent breaks. ✓
- Text while driving.
- Drink caffeine.
Answer: A. Take frequent breaks.
Taking frequent breaks is the recommended way to prevent fatigue on long trips. The handbook lists reducing fatigue risk by taking periodic breaks, roughly every 100 miles or every 2 hours on a long trip. It also tells you to stop driving and rest or nap when you notice signs of tiredness. Caffeine gets its own warning: it may boost awareness for a few hours, but the effect wears off, so the handbook says not to count on it to prevent fatigue. Rest breaks are the method the handbook actually endorses.
4. Which of the following is not a type of distraction?
- Physical
- Mental
- Obtuse ✓
Answer: C. Obtuse
Obtuse is not a type of distraction. The handbook says a distraction is anything that takes your attention away from driving, and it gives examples such as talking to passengers, adjusting controls, eating or drinking, texting, and daydreaming or being occupied with other mental distractions. Those examples include physical actions and mental attention. The handbook never lists obtuse as a distraction category, and nothing in the passage ties that word to something that pulls your attention from driving.
5. Which of the following is not an example of a distracted person who should concern motorists?
- A driver talking to a passenger in their vehicle
- A person sitting on a bench waiting for a bus ✓
- A construction worker on the side of the road
Answer: B. A person sitting on a bench waiting for a bus
6. Distracted driving:
- Is caused only by physical distractions.
- Will be increased by pre-programming radio stations.
- Can be prevented by avoiding conversation with others. ✓
Answer: C. Can be prevented by avoiding conversation with others.
Distracted driving can be prevented by avoiding conversation with others while you are driving. The handbook tells drivers not to engage in complex or emotionally intense conversations with other occupants, and to get passengers to help reduce distractions. For bus drivers it is even more direct: don't talk with riders or do anything else distracting while driving. So keeping conversation out of the driver's seat is a real prevention step. The handbook also points out that a driver busy talking with passengers is one of the distracted drivers you should watch for, which shows talk itself pulls attention away from the road.
7. When driving, you should stop every ____ to take a break to avoid becoming too tired.
- Half hour
- Two hours ✓
- Six hours
Answer: B. Two hours
You should stop about every two hours during a long trip to take a break. The handbook's list of ways to stay alert behind the wheel includes taking periodic breaks, roughly every 100 miles or 2 hours on long trips. It also warns that pushing on while tired is more dangerous than most drivers realize. A two-hour break interval fits that guidance directly, while the other intervals listed in the choices do not appear anywhere in the handbook's fatigue advice.
8. 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.
9. Texting while driving is:
- Allowed if you are contacting your employer.
- Allowed when driving on rural roads.
- Not allowed. ✓
Answer: C. Not allowed.
Texting while driving is not allowed. The handbook states plainly that you may not send or read text messages while driving, and the texting section says federal rules prohibit commercial motor vehicle drivers from texting. It also bars motor carriers from requiring or allowing drivers to text. The only exception described is texting when necessary to reach law enforcement or emergency services, which does not cover ordinary employer contact or a quiet rural road. That makes texting while driving not allowed.
10. Alcohol evaporators are:
- Illegal.
- Used to add alcohol to braking systems to prevent items from freezing. ✓
- Only allowed on vehicles carrying hazardous materials.
Answer: B. Used to add alcohol to braking systems to prevent items from freezing.
Alcohol evaporators are used to put alcohol into the air brake system so ice is less likely to form in the valves and other parts in cold weather. The handbook explains that some air brake systems carry an alcohol evaporator that feeds alcohol into the air system. That alcohol lowers the chance of ice building up in air brake valves and other components when the weather is cold. The handbook also points out why this matters: ice inside the system can stop the brakes from working. So the device is a cold-weather safeguard for the air brake system, not a fuel additive or an extra for certain loads.
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Last checked: 2026-10-17 · Verified from official source
Updated: · Based on the official driver handbook