Ontario Class A Commercial study guide
Ontario Class A Commercial · Work through your exam, one topic at a time.
The Ontario Class A commercial driver's licence is the province's heavy combination-vehicle credential, aimed at drivers who want to operate tractor-trailers and similar articulated units for a living. Candidates typically come from general Class G driving, from other commercial classes, or from outside Ontario and need to convert experience into an Ontario credential. The Ontario Class A Commercial study guide has 7 sections and about 2,222 words.
01Commercial Vehicle Pre-Trip Inspection and Air Brake Checks
The pre-trip inspection and air-brake portion of the Ontario Class A exam checks whether you can find defects before they become roadside failures and whether you can perform and interpret the air-brake tests in the correct sequence. You are expected to know acceptable pressure loss, warning thresholds, and when a defect makes the vehicle unfit to drive.
345 words, about 2 min02Hours of Service and Daily Log Requirements
Hours of service questions test the Ontario adoption of National Safety Code Standard 9 through O. 199/07: daily limits, cycle limits, reset rules, and the daily log.
339 words, about 2 min03Cargo Securement and Load Limits
Cargo questions test NSC Standard 10 and Ontario load-limit rules: selecting tiedowns by working load limit, securing against all directions of movement, and recognizing when a load is over an axle or tire rating. The exam favors practical scenarios over definitions.
309 words, about 2 min04Vehicle Weights, Dimensions and Permit Requirements
This domain tests Ontario legal dimensions, axle and gross weight limits, and when an oversize or overweight permit is required. You need to know the default limits before a permit and the loading mistakes that make a permit irrelevant.
313 words, about 2 min05Coupling, Uncoupling and Safe Operation of Combination Vehicles
Coupling and uncoupling questions test sequence, not strength. The exam wants you to prove the fifth wheel is locked, the trailer brakes work, and the landing gear is stowed before you move.
308 words, about 2 min06Sharing the Road, Hazard Perception and Defensive Driving for Heavy Vehicles
Sharing-the-road questions test hazard perception and defensive driving in a heavy vehicle: following distance, blind spots, turning geometry, and speed choice. The exam rewards the driver who creates space and anticipates other road users’ mistakes.
286 words, about 1 min07Commercial Vehicle Safety Inspections, Brakes and Emergency Procedures
This domain tests inspection responsibilities, brake condition, and emergency response. Ontario expects a driver to know when a vehicle is out of service, how to check brake adjustment, and what to do when brakes fade or a tire fails.
322 words, about 2 min