Key topics, study strategies, and what to focus on — for all 11 trades
Every Red Seal exam is a multiple-choice test: 100–150 questions depending on the trade (100–135 for the 11 trades on this site), four options each, exactly one correct answer, and a pass mark of 70%. There are no trick essay sections and no practical component on the interprovincial written exam — but that doesn't make it easy. Questions come in three cognitive levels defined by the exam developers: Knowledge & Recall (definitions, specs, code values), Procedural & Application (how to carry out a task, in what order, with what tool), and Critical Thinking (given symptoms, find the cause — diagnosis questions).
Here's a part worth looking up: the mix of those question types is published for every trade, and it's dramatically different from trade to trade. A Welder exam is 40–50% pure recall; an Industrial Electrician exam is 40–50% critical thinking. That difference should decide how you study.
Official question counts and question-type mix, from each trade's Red Seal exam information page. Click your trade to start practicing with a bank built around these weightings.
| Trade | Questions | Recall | Procedural | Critical thinking | Study emphasis |
|---|---|---|---|---|---|
| 421A Heavy Duty Equipment Tech | 135 | 5–15% | 45–55% | 35–45% | Procedures + diagnosis |
| 310T Truck & Transport | 135 | <10% | 50–60% | 35–45% | Procedures + diagnosis |
| 310S Automotive Service | 125 | 5–15% | 40–50% | 40–50% | Diagnosis-heavy |
| 309A Construction Electrician | 100 | 5–15% | 60–70% | 20–30% | Code procedures |
| Refrigeration & AC Mechanic | 125 | 20–30% | 50–60% | 10–20% | Procedures + fundamentals |
| Welder | 125 | 40–50% | 35–45% | 10–20% | Memorization-heavy |
| Plumber | 125 | 15–25% | 60–70% | 10–20% | Code procedures |
| Industrial Electrician | 100 | 10–20% | 35–45% | 40–50% | Diagnosis-heavy |
| Ironworker | 120 | 50–60% | 35–45% | <10% | Memorization-heavy |
| Gas Fitter | 100 | 15–25% | 60–70% | 10–20% | Code procedures |
| Sheet Metal Worker | 120 | 20–30% | 60–70% | 5–15% | Procedures + layout |
Source: red-seal.ca exam information pages per trade (question counts and type distributions as published; always confirm current details with your provincial authority).
Built for people working full days. About 45–60 minutes on weekdays, a bit more on weekends. It works because it front-loads finding your weaknesses instead of re-reading what you already know.
Based on each trade's published Major Work Activity weighting — these are the blocks that decide your pass.
Electrical/electronics (25 Q) and hydraulics (25 Q) are a third of your exam combined. Engines (20 Q) next. Don't skip the small blocks — HVAC, structures and hybrid together are 22 of the 135 questions.
Electrical (22 Q), engines (21 Q), steering/chassis/tires (18 Q) lead. Air brakes (17 Q) must be automatic. Don't skip trailers (8 Q) and EV (4 Q).
Electrical/HVAC (23 Q) and steering/suspension/brakes/tires (23 Q) tie for the biggest blocks. Module communication (12 Q) is worth extra practice if your shop does little network diagnosis.
Wiring systems (30 Q) and generation/distribution/services (28 Q) are over half the exam. Know Canadian (CEC) values cold — don't answer with US NEC numbers.
Maintenance/service (28 Q) and installation (26 Q) dominate. Commissioning (21 Q) covers startup, charging and verification procedures.
Welding processes are 54 of 125 questions. Layout & fabrication (28 Q) next. With 40–50% of questions at knowledge and recall (red-seal.ca, checked October 2026), flashcards on symbols, gases, electrodes and codes pay off.
Drainage/DWV (32 Q) and water supply (24 Q) are the core. Low-pressure steam & hot water heating (16 Q) — study it deliberately if your work has not covered it.
With 40–50% critical-thinking questions, symptom-to-cause practice beats re-reading theory. Motors, controls, PLCs and instrumentation scenarios are where the exam is won.
Red Seal puts 50–60% of Ironworker questions at knowledge and recall and under 10% at critical thinking (red-seal.ca, checked October 2026). Rigging capacities, hand signals, bolt specs, WHMIS — drill facts daily.
Testing and commissioning (23 Q), controls and electrical systems (19 Q) and servicing (18 Q) are 60 of the 100 questions; venting and air supply (13 Q), installing and converting fuel systems (13 Q) and piping and tubing (9 Q) follow. Know CSA B149.1 procedures cold.
Procedural exam (60–70%): pattern development and layout steps, fabrication sequences, seam/joint selection. Practice the how-to order, not just definitions.
Everything is free and works without an account — progress saves in your browser.
This site is a question bank and not a textbook: answer first, get some wrong, then read the explanation.
Revisit your Mistakes tab on day 1, day 3, and day 7 after collecting an error. Each successful recall at a longer interval roughly doubles how long the fact sticks.
Red Seal questions reward careful reading: watch for "MOST likely", "FIRST", and "EXCEPT"; eliminate one obviously wrong option before deciding; and treat any suspiciously US-flavoured number (NEC/OSHA values) as a trap in Canadian code questions. Never leave a blank — there's no penalty for guessing.
Prefer to study on paper?
Every question on this site is also sold as a printable bank, one file per trade: all the questions with no answers shown, a printable answer sheet to mark with a pen, then the answer key with the full explanations, a score-by-topic table and a short exam-day guide.
See the printable banks — CA$19 to CA$29 →One-time purchase, 11 trades. The questions stay free to practise here either way.