Ontario Impaired Driving & Safety Practice Test
Zero-tolerance BAC for commercial drivers, fatigue, weather, weight management
Unlock Full TestWhat this Ontario practice test covers
- BAC
- Fatigue
- Weather
- Weight
The actual Ontario knowledge test has 30 questions, and you need at least 24 correct (80%) to pass. This practice test is based on the official Ministry of Transportation Ontario (MTO) driver handbook.
Try sample Ontario questions
These questions come from our bank of 344+. The real Ontario written test draws from similar material in the official driver handbook.
3 free preview of 20
Why are empty or lightly loaded trailers more dangerous in high crosswinds than fully loaded ones?
- A.They are harder to steer
- B.They have a large surface area with less weight to keep them grounded, making them prone to tipping
- C.They create more noise in the wind
- D.They use more fuel in windy conditions
Can a commercial driver in Canada be charged for driving while impaired by drugs, even legal prescription medications?
- A.No - only illegal drugs count
- B.Yes - any substance that impairs driving ability can result in charges
- C.Only if the medication is specifically listed by law
- D.Only if the driver causes an accident
What is the greatest winter hazard for commercial vehicles related to air brakes?
- A.Increased fuel consumption
- B.Moisture freezing in air lines, causing brake failure
- C.Slower windshield defrosting
- D.Difficulty starting the engine
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