Free: 50-Question 310T Mock Exam PDF

What's inside

• 50 original exam-style questions drawn from the five topic areas the 310T Truck & Transport Mechanic bank is built around — Air Brakes, Diesel Engine, Drivetrain, Electrical Systems and Regulations & Inspections
• Every answer explained in the back of the PDF, so a wrong answer turns into something learned, not just a lost mark
• Works offline — study in the lunchroom, the truck, or anywhere without a signal. No account needed.

The five areas in the 161-question bank

The free 50 come from the same bank, so this is roughly the mix you will sit. Each area says what it covers and where marks get lost.

• Air Brakes — 35 questions Compressor and governor cut-in and cut-out, supply and service reservoirs, the air dryer and its purge cycle, foundation brakes, slack adjusters and pushrod stroke, spring parking brakes, relay valves, the tractor protection system, and anti-lock on air systems. The idea that catches apprentices first is that spring brakes apply when air is lost — the opposite of hydraulic logic. After that it is confusing governor cut-out pressure with the low-air warning, and mixing up the tractor protection valve with the trailer supply valve. Pushrod stroke limits depend on chamber size and type, so a stroke measurement means nothing until you know the chamber.
• Diesel Engine — 33 questions Compression ignition and four-stroke diesel operation, high-pressure fuel systems, turbocharging and charge-air cooling, exhaust gas recirculation, aftertreatment including the particulate filter and selective catalytic reduction, engine brakes, cooling and lubrication, and valve adjustment. Marks go missing when a regeneration problem is diagnosed as a fuel problem, or an SCR and DEF fault is treated as an EGR fault. The other habit worth breaking is answering "injectors" to every black-smoke question — an air restriction, a leaking charge-air pipe or a turbo fault is more common and cheaper to check first.
• Drivetrain — 33 questions Heavy-duty push and pull type clutches, the clutch brake, multi-countershaft transmissions with range and splitter sections, automated manuals, driveshafts, universal joints and carrier bearings, driveline working angles, tandem drive axles, and wheel ends. Two errors show up constantly: not knowing the clutch brake exists only to stop the input shaft for a stopped shift into low or reverse, and leaving the inter-axle differential locked on dry pavement. Vibration questions want a measured working angle, not a guess.
• Electrical Systems — 31 questions Multiple-battery banks, heavy starting and charging circuits, 12 and 24 volt arrangements, voltage-drop testing along a long chassis, lighting and trailer circuits through the coupling, multiplexing and the vehicle data link, and reading suspect parameter and failure mode identifiers. The mistake that costs apprentices marks is condemning a starter when the real fault is voltage drop across the cables and ground path — the run from battery to starter on a highway tractor hides serious resistance. Test every battery in a bank individually; one weak unit drags the pack down.
• Regulations & Inspections — 29 questions The block with no light-vehicle equivalent: periodic and annual commercial vehicle inspection, out-of-service criteria, brake stroke and lining condition treated as an inspection item rather than a repair, tire and wheel condition, lighting, coupling devices and the fifth wheel, load securement, and the daily inspection report. The pattern is different from the rest of the exam — you are not asked how to fix something, but whether a defect is minor, major, or out of service. Learn the criteria as criteria, and take the figures from the current inspection standard for the province you write in, because they are set by regulation and change.

Working through the 50 properly

Red Seal allows four hours for the 135-question Truck and Transport Mechanic examination, roughly 1.8 minutes a question. Give yourself 90 minutes for these 50, sit them straight through, and keep the manuals out of reach.

Flag every answer you were not certain about with a small G before you check anything. When you mark it, treat a lucky G as wrong — the same mark on paper, but not knowledge, and the category that quietly sinks people on the day.

Then split the misses two ways, because these topics fail differently. Air brake, diesel and drivetrain misses are usually a system you have never traced end to end — put your hand on the governor, the air dryer or the inter-axle lock and they stop being abstract. Electrical and DOT compliance misses are usually recall: a procedure you have not performed or a criterion you have not read. Air brakes and diesel are 72 of the 165 questions in the bank, so a weak score there is the one worth acting on.

What the Truck and Transport Mechanic exam covers

The exam is written against the Red Seal Occupational Standard for Truck and Transport Mechanic at red-seal.ca, not against one fleet's practice. Red Seal states the interprovincial examination for this trade has 135 questions, the writing time is four hours, the pass mark is 70%, and each question is multiple choice with four choices and one correct answer.

The published weightings show how wide the trade is: electrical and electronic systems 16%, engines and supporting systems 15%, air and brake systems 13%, steering, chassis, suspensions, tires, wheels and hubs 13%, and drive trains 12%, with trailers, cabs, climate control, hydraulics and electric vehicles making up the balance.

Our five study areas do not map one-to-one onto those activities — trailer work, hydraulics and chassis turn up inside the air brake, drivetrain and compliance questions. Read the published standard for the ground a practice bank cannot cover, and confirm eligibility with your provincial or territorial apprenticeship authority.

Want every question?

This mock exam is a 50-question slice. The 310T Complete Question Bank has all 161 questions with a full explanation for every answer, organized by the published occupational standard topic areas, in one printable offline PDF.

What truck apprentices ask us

• How different is this from the 310S automotive set? Almost entirely. The engines are compression ignition with aftertreatment, the brakes are air-actuated and fail to applied, the transmissions are multi-countershaft, the drive axles are tandem, and there is a body of commercial vehicle inspection regulation with no car-side equivalent.
• Should I memorise inspection limits from a practice PDF? No. Use practice questions to learn which items are inspected and what makes a defect out of service, then take the figures from the current inspection standard for the province you write in.
• Do I need an air brake endorsement before I write? Licence endorsements and exam eligibility are separate things, both set by your provincial or territorial apprenticeship and certification authority. Ask them, not a study site.
• Are these actual exam questions? No. They are original questions written against the trade's topic areas. Live Red Seal questions are secure, written and reviewed by tradespeople in the trade.