General Driving Knowledge — 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. General Driving Knowledge: 147 questions.
Questions that do not fit a single topic: lane use, turning, signalling and other rules of the road.
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 | General Driving Knowledge |
| License test | Louisiana CDL permit (CLP) knowledge tests |
| Topic questions | 147 (36% 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
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Questions (147)
1. The National Response Center must be notified of an incident resulting in any of the following, except:
- Death.
- Injury requiring hospitalization.
- Injury not requiring hospitalization. ✓
Answer: C. Injury not requiring hospitalization.
The National Response Center does not have to be notified for an injury that does not require hospitalization. The handbook's notification list covers a hazardous materials incident where someone is killed or an injured person needs hospital care. It also covers major property damage, a long evacuation, road or facility closures, fire, breakage, spillage, radioactive or infectious contamination, and other continuing dangers. A hurt person who does not need hospitalization is not one of the listed triggers, so it is the exception among these choices.
2. With the exception of the straight line backing exercise, a driver may exit their vehicle and check its position during testing exercises up to:
- One time.
- Two times. ✓
- Three times.
Answer: B. Two times.
Except for the straight-line backing exercise, you may exit the vehicle to check its position up to two times during a testing exercise. The handbook sets the free looks by exercise. It allows one free look on the straight-line backing exercise and two free looks on the reverse offset backing exercise, where you stop, set the parking brake, shift to neutral or park, and get out to check where the vehicle sits. Since the question leaves out straight-line backing, the remaining allowance is the two looks given for reverse offset backing. Anything beyond the allowed looks is scored, so the examiner explains the limit before you begin.
3. If color-coded, which color is used to identify emergency, or supply, lines?
- White
- Yellow
- Red ✓
Answer: C. Red
Red is the color used to identify emergency, or supply, air lines. The combination-vehicles section explains that emergency lines are often coded red, whether on the hose itself, the couplers, or other parts. It gives the reason directly: the red coding keeps the emergency line from being confused with the blue service line. The same passage states plainly that blue marks the service lines and red marks the emergency (supply) lines, so when color coding is used, red is the emergency marker.
4. If you’re not sure what to do to extinguish a fire in your vehicle, you should:
- Use water.
- Stay inside the vehicle.
- Wait for the firefighters. ✓
Answer: C. Wait for the firefighters.
If you are unsure what to use on a vehicle fire, wait for the firefighters. The handbook says that if you are not sure what to use on a fire, especially a hazardous materials fire, wait for firefighters. It also tells you to notify emergency services of your problem and location. This answer fits because the manual gives specific extinguisher choices by fire type and warns that water can cause shock on an electrical fire or spread a gasoline fire. When the right agent is unclear, letting firefighters handle it is the safe choice the passage names.
5. The heavier the vehicle:
- The less important the brakes become.
- The harder the brakes need to work. ✓
- The quieter the brakes will sound.
Answer: B. The harder the brakes need to work.
The heavier the vehicle, the harder the brakes need to work. The handbook passage on vehicle weight and stopping distance says that a heavier vehicle makes the brakes do more work to stop it and absorb more heat. That directly supports the idea that extra weight puts more demand on the braking system, so the brakes must work harder. The passage does not say brakes become less important or that weight makes them quieter; it links weight to increased braking work and heat.
6. If a package of hazardous materials is not large enough to hold a label, it should be labeled:
- With a barcode.
- With a tag. ✓
- By being placed in a certain part of the trailer.
Answer: B. With a tag.
If a hazardous materials package is too small to hold a label, it should be labeled with a tag. The Texas CDL handbook says shippers put diamond-shaped hazard warning labels on most hazardous materials packages so others can see the hazard. When that diamond label will not fit, the shipper may put the label on a tag securely attached to the package. It gives compressed gas cylinders that will not hold a label as an example of packages that have tags or decals. That directly supports using a tag when the package is too small for a label.
7. If you’re unfamiliar with the area in which you must back up, you should:
- Get out of your vehicle and walk around the area to become more familiar with it. ✓
- Not use both side mirrors because it can be distracting.
- Wait for someone else to back up in the area so you can see how they do it.
Answer: A. Get out of your vehicle and walk around the area to become more familiar with it.
Get out of your vehicle and walk around the area first so you know the space before you back into it. The handbook says that before you back, you should look at your line of travel, and it tells you to get out and walk around the vehicle to check clearances to the sides and overhead along the path your vehicle will take. It repeats that you should get out and re-inspect your path whenever you are unsure. If the area is unfamiliar, you are unsure, so the walk-around is how you learn what is behind and above you before you move. The same passage also tells you to use the mirrors on both sides, which you can only do well once you know what is actually there.
8. You may leave a vehicle that is carrying explosives unattended:
- Under a bridge.
- In a safe haven. ✓
- On the shoulder of a highway.
Answer: B. In a safe haven.
You may leave a vehicle carrying explosives unattended in a safe haven, which is an approved place for parking such vehicles. The handbook says you are allowed to leave your vehicle unattended in a safe haven. It defines a safe haven as an approved place for parking unattended vehicles loaded with explosives, and says local authorities usually designate these. That points to the safe haven as the permitted place for the situation in the question. The passages do not describe a bridge or a highway shoulder as an approved spot for leaving an explosives-loaded vehicle unattended.
9. Of the following, which is not a recommended way to spot potential signs of trouble?
- Watching the gauges
- Using your senses
- Checking critical items only at the beginning and end of a trip ✓
Answer: C. Checking critical items only at the beginning and end of a trip
Checking critical items only at the beginning and end of a trip is not a recommended way to spot potential signs of trouble. The handbook's during-trip inspection guidance lists watching gauges, using your senses (look, listen, smell, feel), and checking critical items when you stop. It does not limit checks to the start and end of a trip. Finding a defect during a trip matters because a defect can lead to a breakdown or crash. So the choice that keeps checks only at trip endpoints does not match the recommended in-trip approach.
10. Fueling a bus while passengers are on board is:
- Acceptable only at night.
- Acceptable only on trips of more than 100 miles.
- Acceptable only if doing so is unavoidable. ✓
Answer: C. Acceptable only if doing so is unavoidable.
Fueling a bus with passengers on board is acceptable only if doing so is unavoidable. The handbook's passenger-safety section tells drivers to avoid fueling the bus while riders are on board unless it is absolutely necessary. So the only time this is allowed is when there is no practical way to fuel without them aboard. The same passage adds a firm never: do not refuel inside a closed building with riders on board. Notice the rule is about riders, not about the time of day or the length of the trip.
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Last checked: 2026-10-17 · Verified from official source
Updated: · Based on the official driver handbook