Based on the Red Seal Truck and Transport Mechanic exam blueprint: engines, air brakes, electrical, drive trains, chassis and more
Practice on the go and jump straight back to where you left off.
About the certification
In Ontario, Truck and Coach Technician is trade code 310T, a compulsory trade regulated by Skilled Trades Ontario. Across Canada it is the Red Seal trade Truck and Transport Mechanic, so passing the Certificate of Qualification exam also earns the interprovincial Red Seal endorsement.
The Red Seal exam has 135 multiple-choice questions across 11 blocks. The heaviest are electrical and electronic systems (22 questions), engines (21), steering, chassis and suspension (18), and air and brake systems (17). Most questions are procedural or critical-thinking scenarios; under 10% are pure recall. Red Seal doesn't publish the pass mark on the exam page; 70% is the standard Red Seal pass mark.
ExamHub's free 310T practice quiz has 220 original questions weighted to the real exam blocks, with worked calculations and a source for every answer.
What's covered
Categories follow the 11 Red Seal exam blocks, weighted like the real exam.
Try a few
Five sample questions from the question bank, with the answer and explanation.
Why: WHMIS 2015 uses the 16-section SDS format. Section 8 covers exposure controls and PPE; section 4 is first aid, section 5 fire fighting and section 10 stability and reactivity.
Why: Ontario's inspection requires 85 to 100 psi within 2 minutes at 600 to 900 rpm. 2 min 40 s fails, which points to a worn or restricted compressor, a leaking discharge valve, or an inlet restriction.
Why: Battery acid is sulfuric acid, so a mild base such as sodium bicarbonate (baking soda) neutralizes it. Vinegar is also an acid and does not neutralize it.
Why: A weak engine gives a low stall speed. High stall speed means the transmission is not holding torque, usually from worn friction elements or low line pressure.
Why: The high-voltage system is isolated at the service disconnect, any specified wait time is observed, and zero voltage is verified with a properly rated meter before touching conductors.
FAQ
The Red Seal Truck and Transport Mechanic exam has 135 multiple-choice questions. ExamHub's bank has 220 questions, and Test Mode draws a full 135-question timed simulation.
The Red Seal exam page doesn't state it. 70% is the standard Red Seal pass mark, and ExamHub's Test Mode uses 70% with up to 4 hours.
11 blocks: common occupational skills (8 questions), engines and supporting systems (21), air and brake systems (17), electrical and electronic systems (22), drive trains (17), steering, chassis, suspension, tires, wheels and hubs (18), cabs (5), trailers (8), climate control (7), hydraulics (8), and hybrid and electric vehicles (4).
310T Truck and Coach Technician works on heavy trucks, buses and trailers, with air brakes, diesel engines and heavy drive trains. 310S Automotive Service Technician works on cars and light trucks.
No. These are original practice questions written from the Red Seal standard and free official sources. They are not copies of exam questions.