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  • Based on 2025 MB commercial driver's licence manual
  • Updated for May 2025

FREE Manitoba Class 3 Licence Test

In Manitoba, holding a Class 3 commercial driver’s licence opens up a wide variety of job opportunities. Class 3 vehicles are typically single-unit trucks with three or more axles. These vehicles come in a vast number of different configurations. Class 3 trucks commonly used in Manitoba include concrete mixers, dump trucks, flatbed trucks, tanker trucks, vacuum trucks, water trucks, and single-unit snowplow and sanding trucks. Our Manitoba Class 3 Licence Practice Test is here to help!

To apply for a Class 3 commercial driver’s licence in Manitoba, you must be at least 18 years old, hold a Class 5A (Authorized Instruction) or 5I (Intermediate Stage) driver’s licence at minimum, submit a Medical Examination Report, and pass a vision screening test.

Next, you must pass a Manitoba Class 3 knowledge test on the theory of driving Class 3 vehicles. You must score at least 80% to pass. Passing the test enables you to obtain Class 3 Authorized Instruction, which will allow you to practice commercial driving under supervision. Your supervising driver must have held a minimum Class 5F driver’s licence for at least three years, including at least two years with a Class 3 licence. Mandatory Entry-Level Training (MELT) is not required for a Class 3 licence in Manitoba.

For a Class 3 licence, you should also obtain an Air Brakes endorsement on your Class 3 licence because most Class 3 vehicles in Manitoba have air brakes. To do this, start by passing the official Air Brake knowledge test. To obtain the Air Brakes endorsement, you must also pass the official practical air brake test before or with your Class 3 road test.

The Manitoba Public Insurance (MPI) Professional Driver’s Manual and Air Brake Manual are the official references for aspiring commercial drivers in the province. However, if you would like more intensive knowledge training in Class 3 driving than you can get by reading the manuals, we can help!

This 25-question Manitoba Class 3 practice test, the first of twelve such tests we offer, covers the basics of operating Class 3 vehicles. All practice questions are based on the above MPI references. If you get stuck on a practice question, ask our AI Assistant to give you a hint, rephrase the question, or answer your own questions about commercial driving. If you still miss the practice question, the AI Assistant will give you the correct answer and an explanation.
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  • Perfect for first-time and renewal commercial applicants, and those adding endorsements

What you need to know

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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List of questions (classic view)
  1. In determining how well your air brake system works, which is NOT a significant factor?
  2. Which colour is the trailer supply line?
  3. When is a pre-trip inspection required?
  4. What gauges should you check after starting your vehicle?
  5. Why are there two service tanks in a modern air brake system?
  6. What is the purpose of the National Safety Code?
  7. What does this sign mean?
  8. In Canada, how many classes of dangerous goods are there?
  9. What must you do at a stop sign with a painted stop line?
  10. When brakes become overheated, they also become
  11. What does this sign mean?
  12. Your vehicle is equipped with an air brake system, including a belt-driven air compressor. How do you check for correct belt tension?
  13. What does this sign mean?
  14. Before driving down a grade (hill), you should
  15. What does this sign mean?
  16. Your vehicle has tandem drive axles and is equipped with an inter-axle differential. You should NOT use it if
  17. What does this sign mean?
  18. What is a commercial vehicle's danger zone?
  19. This sign indicates that you may park for one hour
  20. What is the first step of the pre-trip inspection?
  21. In a vehicle equipped with air brakes, the pushrod stroke occurs when compressed air enters the
  22. What is the Gross Vehicle Weight Rating (GVWR)?
  23. Driving a commercial vehicle on the road is
  24. In an air brake system, what does a governor do?
  25. Where are the air brake chambers located?
 (5  allowed to pass)
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