Ontario Class D (DZ) Practice Test 2026
Practise for the Ontario Class D heavy-truck knowledge test with questions on Schedule 1 daily inspections, major and minor defects, inspection stations and road signs.
Practice tests
About the Class D licence
A Class D licence lets you drive a motor vehicle over 11,000 kg gross or registered gross weight, or a combination where the towed vehicle is not over 4,600 kg. It also covers Class G. Add a Z endorsement (DZ) for trucks with air brakes.
On the road test
- A daily inspection of the vehicle.
- Backing (offset or 90-degree alley dock).
- On-road driving: turns, intersections, lane changes, expressway, curves and roadside stops.
If your truck has air brakes, also practise the Air Brake (Z) test.
Official sources: Official MTO Truck Handbook ↗ • Get a truck driver’s licence (ontario.ca) ↗
Frequently asked questions
What is a DZ licence in Ontario?
A Class D licence with a Z air brake endorsement. It lets you drive heavy straight trucks equipped with air brakes, such as dump trucks.
What is the towing limit on a Class D licence?
The towed vehicle must not exceed 4,600 kg gross or registered gross weight. Heavier trailers need a Class A licence.
Does the Class D road test include coupling?
No. Tractor-trailer coupling and uncoupling is part of the Class A test, not Class D.