New Brunswick Commercial Licence Practice 2026 · Class 1, 2 & 3

New Brunswick's commercial knowledge test covers the rules and operating standards for class 1 (tractor-trailer). It's administered by Service New Brunswick (SNB). New Brunswick does not publish a pass mark or the number of questions for this test. No time limit is published. New Brunswick uses numbered classes 1 to 4: Class 1 for truck tractors and their combinations, Class 2 for buses carrying more than 24 passengers, Class 3 for vehicles with three or more axles, and Class 4 for ambulances, taxis and buses carrying fewer than 25. Air brakes need the E endorsement.

Hours of service are a major topic on the test. The federal rules apply to carriers that operate across provincial borders, and once a carrier falls under them, all of its drivers must comply, even those who never leave the province. In a day you cannot drive after 13 hours of driving or 14 hours on duty, and in a work shift you cannot drive once 16 hours have passed since your last 8 consecutive hours off duty. Cycle 1 allows 70 hours on duty in 7 days and Cycle 2 allows 120 hours in 14 days; 36 consecutive hours off resets Cycle 1 and 72 resets Cycle 2. Carriers must equip their vehicles with a certified electronic logging device (ELD) unless an exemption applies, such as local driving.

Air-brake systems are fundamental to most heavy commercial vehicles and operate on a different principle than hydraulic brakes - air pressure releases spring-loaded brakes rather than applying them. Loss of air pressure causes spring-brake application, which is why the system "fails safe." The test covers air-brake fundamentals: governor cut-out and cut-in pressure (cut-out is typically 120 to 135 psi, with cut-in 20 to 25 psi lower), the low-air warning (it must come on before pressure drops below 60 psi, or 414 kPa), the 20 to 45 psi range where spring brakes apply, and slack adjuster inspection.

Pre-trip inspection is one of the most important duties of a commercial driver and is heavily tested. A complete pre-trip covers: tires (tread depth, sidewall damage), wheels (lug nut visual check), brakes (slack, drum/rotor inspection, hose integrity), lights, mirrors, fluids, fifth wheel, kingpin, and trailer connections.

Cargo securement follows National Safety Code (NSC) Standard 10, which sets minimum tie-down requirements based on cargo weight, type, and trailer configuration. Transporting dangerous goods falls under the Transportation of Dangerous Goods (TDG) rules, which are the same across Canada: drivers carry the shipping documents, display the proper placards, and hold a TDG Certificate of Training issued by their employer, valid for 36 months. It is a training certificate, not a licence endorsement.

Brushing up on Canadian road signs? Our sign-specific practice covers every regulatory, warning, and information sign you'll see on the test.