2025 ON Commercial General Knowledge: 50-Question Test

1. At an intersection where there are no signs or lights, you must yield the right-of-way to...
2. If you have to drive in fog, which of these is not a safe driving tip?
3. If you have to drive through a flooded area, at what speeds should you test your brakes afterward?
4. According to studies, when do accidents caused by drowsiness typically occur?
5. How does the anti-lock braking system (ABS) function?
6. What is usually the maximum speed of tractors, combines and other farm vehicles?
7. When navigating country roads at night, when should you switch to low beam headlights?
8. You should switch to your low-beam headlights when you are within what distance of an oncoming vehicle?
9. How can you identify a snow removal vehicle from a distance of within 150 metres?
10. When driving at night on unlit roads, what could potentially deceive you into thinking you can see further than you actually can?
11. When passing a cyclist, what is the recommended minimum distance you should keep between your vehicle and the cyclist?
12. If you're parked on the side of the road, what should you do before opening your car door?
13. If an emergency vehicle approaches while you're in a roundabout, how should you respond?
14. What is not an action you must take after a minor vehicle collision in which no one was injured?
15. What does a steady yellow traffic signal indicate?
16. If your vehicle has broken down, you must move it off the roadway if possible, unless there is a clear view for at least ________ in both directions.
17. Which action should you not perform to avoid hitting large animals?
18. Why are animal-crossing signs installed on the road?
19. Besides flags, what else is required to be displayed on both the front and rear of an oversized vehicle/load?
20. How are warning signs typically shaped?
21. What minimum amount of damage must a collision cause to be reportable by law to the police?
22. Which of these is not an usual temporary condition sign?
23. What should you avoid doing when you observe an approaching emergency vehicle with its lights or siren on?
24. What isn't an effective method to maintain the safety of roadside workers near a construction site?
25. Which of the following isn't a method to reduce your chances of colliding with an animal on a roadway?
26. If you're at the scene of a crash where someone is injured and you lack first aid training, what should you do?
27. If you can't move your commercial vehicle off the roadway in a speed limit zone greater than 60 km/h, you must set out one type of emergency warning device at what distance?
28. Is there any circumstance in which you are permitted to make a left turn on a red light
29. If you encounter a large animal while driving, you should NOT
30. As a commercial vehicle operator, do you need to know how to prevent fires and basic firefighting techniques?
31. If your vehicle is immobilized on the roadway and it's impractical to move it off the roadway, there must be a clear view of it on the roadway from which distance in both directions?
32. What needs to be used to mark vehicles and/or loads in excess of the dimensions prescribed under Section 109 of the Highway Traffic Act?
33. What is every driver involved in a collision required to do?
34. It is illegal to follow a fire truck or an ambulance within
35. Are commercial drivers permanently exempt from using two-way radios, provided the microphone is securely mounted and easy for the driver to reach?
36. Which of these vehicles display a flashing green light?
37. If another driver threatens you, what should you not do?
38. Which of the following is not recommended to reduce driver distractions?
39. Which of the following does NOT usually cause a truck fire?
40. What should you not do if you're experiencing stress while driving?
41. Except for police, fire and ambulance, what other vehicle is classified as an emergency vehicle when it's stopped with flashing lights?
42. When the view of your parked vehicle is blocked by a hill, curve, or other obstruction within 150 metres, what should you do?
43. Should you exchange information with the other driver in a minor accident with minimal damage?
44. What prompts drivers aged 65 to 79 with class A, B, C, D, E or F licences to undergo a vision, knowledge, and road test?
45. Which of these are not required to pass your road test successfully?
46. If a driver is convicted of driving-related offences, demerit points are recorded on their records. How long does this remain on the record from the date of the offence?
47. How often do drivers under the age of 80 with class A, B, C, E or F licences need to pass a vision and knowledge test in order to renew their licence?
48. If you receive a notice and a blank medical report form in the mail three months before your medical report is due, which of the follow would you not need to do?
49. How frequently are Drivers aged 65 or older required to submit a medical report?
50. What would you need to do if your licence has been suspended, cancelled, or expired for more than three years?