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Ontario Class B (Bus) Commercial Licence Practice Test 10

  • Perfect for first-time and renewal commercial applicants, and those adding endorsements
  • Based on 2024 ON commercial driver's licence manual
  • Updated for July 2024
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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ON commercial driver's licence
5 out of 5,
1 votes
What you need to know
Welcome to Practice Test 10! Today's focus is on blind spots, an area often tested for Class B licenses in Ontario. The test includes 50 questions and requires an 80% passing score. Understanding blind spots is essential for safely navigating larger vehicles like buses, making it a key area for this year’s exam.
What to expect on the official exam



correct answers to pass


passing score

More resources
  1. General Knowledge 1
  2. General Knowledge 2
  3. General Knowledge 3
  4. General Knowledge 4
  5. General Knowledge 5
  6. General Knowledge 6
  7. General Knowledge 7
  8. Road Signs
  9. Road Signs 2
  10. General Knowledge Marathon
  11. General Knowledge Exam Simulator
  12. Class A Licence Test 1
  13. Class A Licence Test 2
  14. Class A Licence Test 3
  15. Class A Licence Marathon
  16. Class A Licence Exam Simulator
  17. Class B Licence Test 1
  18. Class B Licence Test 2
  19. Class B Licence Test 3
  20. Class B Licence Test 4
  21. Class B Licence Test 5
  22. Class B Licence Test 6
  23. Class B Licence Test 7
  24. Class B Licence Test 8
  25. Class B Licence Test 9
  26. Class B Licence Test 10 (you are here)
  27. Class B Licence Test 11
  28. Class B Licence Marathon
  29. Class B Licence Exam Simulator
  30. Class C Licence Test 1
  31. Class C Licence Test 2
  32. Class C Licence Test 3
  33. Class C Licence Test 4
  34. Class C Licence Test 5
  35. Class C Licence Test 6
  36. Class C Licence Test 7
  37. Class C Licence Test 8
  38. Class C Licence Test 9
  39. Class C Licence Test 10
  40. Class C Licence Test 11
  41. Class C Licence Marathon
  42. Class C Licence Exam Simulator
  43. Class D Licence Test 1
  44. Class D Licence Test 2
  45. Class D Licence Test 3
  46. Class D Licence Marathon
  47. Class D Licence Exam Simulator
  48. Class F Licence Test 1
  49. Class F Licence Test 2
  50. Class F Licence Test 3
  51. Class F Licence Test 4
  52. Class F Licence Test 5
  53. Class F Licence Test 6
  54. Class F Licence Test 7
  55. Class F Licence Test 8
  56. Class F Licence Marathon
  57. Class F Licence Exam Simulator
  58. Air Brake Test 1
  59. Air Brake Test 2
  60. Air Brake Test 3
  61. Air Brake Test 4
  62. Air Brake Test 5
  63. Air Brake Test 6
  64. Air Brake Test 7
  65. Air Brake Test 8
  66. Air Brake Test 9
  67. Air Brake Test 10
  68. Air Brake Test 11
  69. Air Brake Test 12
  70. Air Brake Test 13
  71. Air Brake Test 14
  72. Air Brake Marathon
  73. Air Brake Exam Simulator
  74. AZ Licence Exam Simulator
List of questions (classic view)
  1. What does this sign mean?
  2. What does this sign mean?
  3. What does this sign mean?
  4. What does this sign mean?
  5. What does this sign mean?
  6. What does this sign mean?
  7. What does this sign mean?
  8. What does this sign tell you about the road ahead?
  9. What does this sign tell you?
  10. What does this signal mean?
  11. What emergency equipment is required in a bus?
  12. What is a runaway lane?
  13. What is an advantage of automatic slack adjusters?
  14. What does this sign mean?
  15. What is the best way to check for vehicles in your blind spot?
  16. What is the best way to ensure that there are no vehicles or cyclists in your blind spot?
  17. What is the purpose of an antilock braking system (ABS)?
  18. What is the purpose of checking your vehicle's slack adjusters?
  19. What is the wheelbase of a vehicle?
  20. What is this sign telling you?
  21. What is this sign telling you?
  22. What is your most important concern when operating a vehicle used for transporting passengers?
  23. What legal documents are all drivers required to have when operating a vehicle?
  24. What makes the roads extra slippery at the start of a rainfall?
  25. What should you do before making a left turn?
  26. What should you do if your headlights fail?
  27. What is total stopping distance?
  28. What should you do to prevent a vehicle fire?
  29. What should you do when driving at night?
  30. When a tire is underinflated,
  31. When another vehicle is merging into your lane from the right, you should
  32. When approaching a narrow bridge from a curve, you should
  33. When approaching an intersection at which you intend to turn, you should
  34. When are water-cooled brakes used?
  35. When backing up a large vehicle, you should
  36. When braking, just before you come to a stop, you should
  37. When can you drive side by side with a motorcycle in one lane?
  38. When driving a school bus, you must NOT do which of the following?
  39. When adjusting a manual slack adjuster, how can you tell whether you are turning the adjusting bolt in the correct direction?
  40. When can a vehicle with just one occupant (the driver) use this lane?
  41. When can you refuse to transport a passenger?
  42. When driving behind a large commercial vehicle, you must make sure that you can see
  43. When driving in heavy fog, you should use
  44. When driving in the United States, you may drive no more than ____ hours during your on-duty time.
  45. When driving in the Yukon or Northwest Territories, you can be on duty for no more than ____ hours at a time.
  46. When driving in the Yukon or Northwest Territories, you may drive no more than ____ hours during your on-duty time.
  47. When driving, the holder of a Class 5–GDL (Probationary) licence must not have a blood alcohol concentration greater than
  48. When fuelling a vehicle, you should NOT
  49. When is it especially important to look out for wild animals on the road?
  50. When is it not necessary to do a shoulder check?
  51. When must you yield the right-of-way to an emergency vehicle that is sounding a siren?