Free Ontario Class D practice test
Practise for the Ontario Class D (heavy truck) knowledge test with original questions based on the current MTO Truck Handbook: inspections, hours of service, loads, brakes and more.
About the Ontario Class D licence
A Class D licence lets you drive trucks over 11,000 kg, such as dump trucks and straight trucks, and tow trailers up to 4,600 kg. You must be 18, hold a G licence, pass a medical, a vision test, a knowledge test and a road test.
- Trucks with air brakes also need a Z endorsement.
- The road test includes a daily inspection, where you name equipment and describe its condition.
- Bring wheel chocks if the truck has air brakes.
- Know your numbers: hours of service, tire tread depths, inspection rules, size limits and warning-device distances.
These are independent practice questions written by Canam Fleet Safety Group. They are not the official test and are not affiliated with or endorsed by the Ontario Ministry of Transportation, ServiceOntario or DriveTest. Rules change, so always check the current official MTO handbooks and the Highway Traffic Act. Last reviewed October 2026.
Ready to get your Z endorsement?
Learn air brakes from an MTO-certified air brake instructor at Canam Fleet Safety Group in Mississauga: classroom theory plus hands-on yard practice for the practical test.