ON Class C Commercial Licence Practice Test 10 2025

1. When another vehicle is merging into your lane from the right, you should
2. When approaching a narrow bridge from a curve, you should
3. When approaching an intersection at which you intend to turn, you should
4. When are water-cooled brakes used?
5. When adjusting a manual slack adjuster, how can you tell whether you are turning the adjusting bolt in the correct direction?
6. When backing up a large vehicle, you should
7. When braking, just before you come to a stop, you should
8. When can a vehicle with just one occupant (the driver) use this lane?
9. When can you drive side by side with a motorcycle in one lane?
10. When can you refuse to transport a passenger?
11. When driving a school bus, you must NOT do which of the following?
12. When driving behind a large commercial vehicle, you must make sure that you can see
13. When driving in heavy fog, you should use
14. When driving in the United States, you may drive no more than ____ hours during your on-duty time.
15. When driving in the Yukon or Northwest Territories, you can be on duty for no more than ____ hours at a time.
16. When driving in the Yukon or Northwest Territories, you may drive no more than ____ hours during your on-duty time.
17. When driving, the holder of a Class 5–GDL (Probationary) licence must not have a blood alcohol concentration greater than
18. When driving at night, you should do which of the following?
19. When fuelling a vehicle, you should NOT
20. When is it especially important to look out for wild animals on the road?
21. When is it not necessary to do a shoulder check?
22. When must you yield the right-of-way to an emergency vehicle that is sounding a siren?
23. When parking a vehicle with a manual transmission facing uphill, you should always leave the parking brake on and the transmission in
24. When passing parked cars in a bus, what should you do?
25. When pulling away from the curb in a bus, you should
26. When pulling out from an alley, you must
27. When refuelling a school bus, you must
28. When refuelling your vehicle, you should
29. When should you check the tire pressures?
30. When transporting persons with disabilities, you should do all of the following EXCEPT
31. When traveling down a steep hill, you should NOT
32. When travelling downhill, what can you do to prevent your brakes from overheating?
33. When turning left from one two-way street onto another, where should you begin your turn?
34. When using the applied stroke method to check pushrod stroke, how much pressure should you apply to the service brakes?
35. When you are following a motorcycle, allow extra space between your vehicle and the motorcycle because
36. When you are preparing to make a right turn from the right lane, you should shoulder check to the right to make sure
37. When you conduct a pre-trip inspection of your vehicle, all of the following should be considered major defects EXCEPT
38. When you encounter a flashing yellow signal at an intersection, what should you do?
39. When you press down on the clutch in a vehicle with manual transmission, what does it do?
40. When you see a potential hazard in your danger zone, you should
41. When you're driving in an urban area, you should scan ahead about
42. Where are a large commercial vehicle's blind spots?
43. Where are a large vehicle's blind spots?
44. Where would an air dryer be installed in an air brake system?
45. Which of the following are advantages of a dual air brake system?
46. Which of the following are true about a humpback railway crossing?
47. Which of the following are true about brake fade?
48. Which of the following can impair your ability to safely operate a vehicle?
49. Which of the following can impair your driving?
50. Which of the following can increase the danger of crossing railway tracks?
51. Which of the following factors determine the sharpness of your large vehicle’s turn?
52. Which of the following may reduce the amount of steering control you have?
53. Which of the following should you check periodically during your trip?