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  • Updated for June 2025
  • Based on 2025 MS commercial driver's license manual

Free Mississippi CDL Permit Practice Test: General Knowledge 2025

There are three classes of Commercial Driver Licenses (CDLs). A Class A CDL allows you to operate combination vehicles with a Gross Combination Weight Rating (GCWR) of 26,001 pounds or more in which the towed vehicle weighs more than 10,000 pounds. This class of CDL is typically for driving semi-trucks or tractor-trailers. A Class B CDL allows you to operate a single vehicle with a Gross Vehicle Weight Rating (GVWR) of 26,001 pounds or more, or to tow a vehicle that does not exceed 10,000 pounds. This license is typically for driving buses and straight trucks, including box trucks and most dump trucks. A Class C CDL allows you to operate relatively smaller vehicles designed to transport hazardous materials or 16 or more occupants (including the driver). You must decide which class of CDL you want to apply for, based on the types of vehicles you expect to be driving in your career.

Before you can obtain a CDL, you must become proficient in commercial driving. To practice commercial driving (under supervision), you must obtain a Commercial Learner’s Permit (CLP). And for that, you must submit to a medical examination and pass the official General Knowledge written test. And we can help you pass that written test easily.

The official Mississippi Commercial Driver License Manual contains all the information covered by the questions on the official knowledge test. But it’s not that easy to learn from. One better study tool is our set of General Knowledge practice tests like this one. The structure and content of this free Mississippi CDL permit practice test are similar to those of the official test. It is up to date as of June, 2025. There are 50 questions on such topics as cargo management, following distance, vehicle components, and vehicle maneuvers. But unlike the official test questions, each of our practice questions includes a helpful hint and an explanation of the correct answer. With our practice tests, there’s no pressure to pass and no timer to beat. Take all the time you need to practice and learn the material.

So, where will you be driving commercially? Interstate 55 is a major north-south truck route. It runs from New Orleans, Louisiana, through Mississippi, to Chicago, Illinois. A major east-west route is Interstate 20, which runs from Reeves County, Texas to Jackson, Mississippi (where it connects with I-55), and from there to Florence, South Carolina. Two other major routes for transporting cargo are U.S. Route 49, which runs from Piggott, Arkansas south to Jackson, Mississippi; and U.S. Route 82, which runs from Alamogordo, New Mexico through Mississippi to Glynn, Georgia.

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What you need to know

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Verified by Steven Litvintchouk, M.S., Chief Educational Researcher, Member of ACES. See our detailed commitment to accuracy and quality in our practice tests.
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What to expect on the actual MS DMV exam

50

questions

40

correct answers to pass

80%

passing score

List of questions (classic view)

  1. If you are traveling at 55 mph in a 30-foot vehicle, you should leave how many seconds of following distance?
  2. Which of the following should you NOT check during a trip?
  3. What will help a drunk sober up?
  4. On wet roads, you should reduce your speed by
  5. An anti-lock braking system (ABS) will
  6. The minimum tread depth for front tires is
  7. What is the best way to figure out how many seconds of following distance you have?
  8. How many hours of sleep does the average person need per night to avoid accumulating "sleep debt"?
  9. On which of the following types of fires should you NOT use a B:C fire extinguisher?
  10. Why should you cover your cargo?
  11. If you are confronted by an aggressive driver, you should
  12. To help you stay alert and safe while driving, you should
  13. What is a common cause of tire fires?
  14. Which is NOT one of the four basic skills that operating a commercial vehicle requires?
  15. If you double your speed, how much more distance will it take to stop?
  16. While driving at night, which lights should you use as often as you can?
  17. To transport cargo safely, which of the following are you NOT responsible for?
  18. Where should you place your warning devices if you must stop on a one-way road or divided highway?
  19. How many tiedowns are required for a 20-foot load?
  20. Hazardous materials placards are
  21. What is the gross vehicle weight (GVW)?
  22. Always try to back toward the driver's side because
  23. Do empty trucks have the best braking?
  24. Letting the air out of hot tires
  25. Before transporting a sealed load, you must check
  26. When you start going down a steep downgrade, which of the following should influence your choice of speed?
  27. What is the definition of a hazard?
  28. Which of the following is a key steering component?
  29. Which of the following should you NOT do if you experience a tire failure?
  30. It has just reached freezing. Which of the following areas may be slippery?
  31. What can you do at an accident scene to help avoid another accident?
  32. You should inspect wheel bearing seals for
  33. Total stopping distance equals
  34. During your pre-trip test, when examining hoses with the instructor, you need to look for
  35. In which of the following two situations should you downshift?
  36. The most important hand signal you should agree on with a helper is
  37. How long does it take a typical tractor-trailer to clear a double railroad track?
  38. What might happen if you swing wide to the left before you turn right?
  39. Which of the following are most likely to get stuck at a raised railroad crossing?
  40. Which of the following statements about retarders are correct?
  41. You don't want to be a distracted driver, so you
  42. Starting the engine and inspecting the cab involves each of the following tasks EXCEPT
  43. You should put the starter switch key into your pocket while you perform the pre-trip inspection because
  44. Which of these is NOT part of the basic method for shifting up?
  45. If the engine is not overheated, is it completely safe to remove the radiator cap?
  46. How can you determine if your vehicle is equipped with an anti-lock braking system (ABS)?
  47. How can you start moving without rolling backward?
  48. How often must you stop to check your cargo while on the road?
  49. For how long will you lose your CDL driving privileges if you are convicted of a second DUI offense in either a CMV or your private vehicle?
  50. When backing, it is important to use a helper
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