General Driving Knowledge — Mississippi
Mississippi CDL practice test: 463 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: 140 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 | Mississippi CDL permit (CLP) knowledge tests |
| Topic questions | 140 (30% of 463 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 (140)
1. An improperly placarded vehicle:
- May never be moved.
- May only be moved in an emergency. ✓
- May be driven if the cargo is not radioactive.
Answer: B. May only be moved in an emergency.
An improperly placarded vehicle may only be moved in an emergency, when moving it is needed to protect life or property. The hazardous materials section of the handbook says to attach the right placards before you drive. It then states the one exception: you are allowed to move a vehicle that is not placarded correctly only during an emergency, to protect life or property. So the normal rule is no driving until the placards are right, and the emergency exception is narrow. It is tied to protecting people and property, not to convenience, scheduling, or finishing a route.
2. Which type of product is usually transported by unbaffled tanks?
- Food ✓
- Fuel
- Gravel
Answer: A. Food
Food is the product usually transported by unbaffled tanks. The handbook describes unbaffled, or smooth bore, liquid tankers as having nothing inside to slow the liquid, so forward and backward surge is strong. It then says these tanks are normally used for food products and gives milk as an example. The reason given is that sanitation rules do not allow baffles because the inside of the tank is hard to clean with them. That points to food rather than the other choices.
3. When a shipper packages hazardous materials, they certify that the package:
- Does not contain hazardous materials.
- Has been prepared in compliance with the rules. ✓
- Was packed at a specific location.
- Will be placed on the trailer first.
Answer: B. Has been prepared in compliance with the rules.
The shipper certifies that the package has been prepared in compliance with the rules. The handbook says a shipper who packages hazardous materials signs a certification that the package was prepared according to the rules. That signed certification appears on the original shipping paper, with limited exceptions for private carriers hauling their own product and carrier-supplied packages such as cargo tanks. The driver may rely on the shipper's certification about proper packaging unless the package is clearly unsafe or does not comply with the hazardous materials rules. So the certification is about compliance with packaging rules, not about what the package contains or where it sits in the load.
4. After a trip:
- A vehicle should be placed out-of-service.
- A vehicle's oil should be changed.
- A vehicle's after-trip inspection should be completed. ✓
- A vehicle's battery should be disconnected.
Answer: C. A vehicle's after-trip inspection should be completed.
5. When you must travel down a grade, when should you switch into a lower gear?
- Before beginning the grade ✓
- After you have already started the grade
- As far down the grade as possible
- At the bottom of the grade
Answer: A. Before beginning the grade
You should switch into a lower gear before beginning the grade. The handbook says to shift the transmission to a low gear before starting down the grade. It warns that if you wait until your speed has built up, you may not be able to shift into a lower gear, and you could lose engine braking effect. Engine braking is the main way to control speed on a downgrade, so choosing the low gear early keeps it available.
6. To help prevent rollovers, you should:
- Accelerate quickly after stopping.
- Drive slowly around turns. ✓
- Keep the load near the back of the trailer.
- Keep the load on one side of the trailer.
Answer: B. Drive slowly around turns.
To help prevent rollovers, you should drive slowly around turns. The handbook's rollover section says that keeping the cargo low and driving slowly around turns are the two things that help prevent a rollover. It adds that rollovers happen when you turn too fast, and tells you to drive slowly around corners, on ramps, and off ramps. Turning slowly gives the tall, heavy vehicle less chance to tip over.
7. During an applied leakage test, the maximum leakage rate for a triple combination vehicle is ____ in a minute.
- 2 psi
- 4 psi
- 6 psi ✓
Answer: C. 6 psi
8. When arriving at a destination, it is best to remind exiting passengers to take their carry-on bags with them:
- Before you stop the bus. ✓
- After you stop the bus.
- At least five times.
- As they exit the bus.
Answer: A. Before you stop the bus.
It is best to remind exiting passengers to take their carry-on bags with them before you stop the bus. The handbook's section on arriving at your destination tells drivers to remind riders to take carry-ons with them when they get off. It then says plainly that it is best to tell them before coming to a complete stop. The reminder is something you give while the bus is still moving and riders still have time to look around their seats, so they can gather their bags rather than leaving them behind. Announcing it earlier fits with the handbook's general approach of telling passengers things ahead of time rather than at the last moment.
9. Combination vehicles:
- Often have taller trailers than single commercial vehicles.
- Are usually lighter than single commercial vehicles.
- Require more skill to drive than single commercial vehicles. ✓
Answer: C. Require more skill to drive than single commercial vehicles.
Combination vehicles require more driving skill to drive than single commercial vehicles. The handbook's combination-vehicle section says these rigs are usually heavier and longer than single commercial vehicles, and that they demand more driving skill. It also says combination drivers need more knowledge and skill than drivers of single vehicles. That direct comparison supports the choice about greater skill. The passage does not use trailer height or lighter weight as the difference.
10. Surges are strongest in:
- Bulkhead tanks.
- Baffled tanks.
- Unbaffled tanks. ✓
- Tanks with an open manhole.
Answer: C. Unbaffled tanks.
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Last checked: 2026-10-17 · Not yet verified
Updated: · Based on the official driver handbook