What is actually on the 310S Red Seal exam
The Interprovincial exam for Automotive Service Technician has 125 questions, and Red Seal publishes exactly how they spread across the 8 Major Work Activities. Here is that breakdown, copied from the source and linked to it.
The published weighting
The percentages are Red Seal's own. The question counts beside them are ours — read the note under the table.
| Major Work Activity | Share of exam | Approx. questions | In our bank |
|---|---|---|---|
| APerforms common occupational skills | 7% | ≈9 | 730 |
| BDiagnoses and repairs engine and engine support systems | 17% | ≈21 | 2,482 |
| CDiagnoses and repairs vehicle module communications systems | 10% | ≈13 | 175 |
| DDiagnoses and repairs driveline systems | 14% | ≈17 | 1,245 |
| EDiagnoses and repairs electrical and comfort control systems | 18% | ≈22 | 1,713 |
| FDiagnoses and repairs steering, suspension, braking and control systems, tires, hubs and wheel bearings | 19% | ≈24 | 1,335 |
| GDiagnoses and repairs restraint systems, body components, accessories and trim | 8% | ≈10 | 152 |
| HDiagnoses and repairs hybrid and electric vehicle (EV) systems | 7% | ≈9 | 419 |
Why those counts carry a ≈
Red Seal publishes a percentage per activity and a total. It does not publish a question count per activity — not for this trade, not for any trade. So the counts above are our own arithmetic: each percentage applied to 125 questions, with the rounding leftovers assigned by largest remainder. They are a good guide and they are not official. Any page giving you an exact per-topic count without saying this made it up.
What kind of questions
Red Seal also publishes the mix of question types. Every question has four options, A to D, and one credited answer.
Knowledge and recall
5–15% of the exam
Procedural and application
40–50% of the exam
Critical thinking
40–50% of the exam
How our bank lines up
Our own coverage of each activity, for comparison. These are questions we hold — not questions on the exam.
8,251 of our active 310S questions are mapped to these activities, every one with a written explanation, in English and Arabic.
Questions people ask about the 310S blueprint
125. Red Seal publishes that figure on the exam-weightings page linked below. Each question has four options and only one is credited.
No. It publishes a percentage for each Major Work Activity and a total for the exam, and nothing more granular. Counts per topic — including ours — are always somebody's arithmetic on those percentages.
It is what red-seal.ca publishes today, read on 2026-08-29. The source page is linked below so you can check it against this one rather than taking our word for it. Any page giving a different total does not match the current source.
Weight is a reasonable starting point — the heaviest activities carry the most marks. But your own weakest areas matter more, which is what a diagnostic is for.
Yes. The Interprovincial Red Seal examination is common across Canada — same standard, same weighting, same paper. What differs by province is the certification path to sitting it.
No, and nobody honestly has them. Our questions are written to the same standard and the same weighting, which is what makes practice transfer. The official Red Seal sample questions are deliberately excluded from everything we publish.
Source
Every figure above comes from these two pages, read on 2026-08-29. If they change, this page is wrong until we update it.
Study to the weighting, not to a guess
Our 310S bank is built against this breakdown, with an explanation on every question.