Free Ontario AZ (Class A) practice test
Practise for the Ontario Class A tractor-trailer knowledge test with original questions based on the current MTO Truck Handbook and hours-of-service regulation, including truck signs and coupling safety.
About the Ontario Class A (AZ) licence
A Class A licence lets you drive tractor-trailers and other combinations where the towed vehicle is over 4,600 kg. Most drivers also need the Z air brake endorsement, which together is called an AZ licence.
- You must be 18, hold a G licence or higher, and pass a medical, vision test, knowledge test and road test.
- From January 1, 2027, you must have held a G licence for at least 6 months before your Class A road test.
- The road test includes a daily inspection, uncoupling and coupling, backing the combination, and on-road driving.
- Testing with a trailer that has no air brakes gives a restricted (AR) licence.
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.