Trade certification · Welding
Red Seal Welder Exam (Interprovincial)
The interprovincial Red Seal exam for welders (trade code 456A): 125 multiple-choice questions in 4 hours, 70% to pass. Practice questions weighted to the Red Seal exam breakdown: common occupational skills, layout and fabrication, cutting and gouging, and the SMAW, GMAW/FCAW/MCAW, GTAW and SAW processes.
Questions last checked against the official sources on October 11, 2026.
The real exam at a glance
- Questions
- 125 multiple choice, 4 options, one correct answer
- Time
- 4 hours
- To pass
- 70%
- Question types
- Knowledge and recall 40–50%, procedural and application 35–45%, critical thinking 10–20%
- Provided
- Welder formula sheet and acronym list
- Languages
- English and French
- Delivered by
- Your province's or territory's apprenticeship authority (Ontario: Skilled Trades Ontario, trade code 456A)
- Body
- Red Seal Program, Canadian Council of Directors of Apprenticeship
What you'll practise
Try a question
In the Steelworker manual, which hose colour connects to the oxygen regulator?
- Red
- Black
- Yellow
- Green
Show the answer
D. Green — The green hose connects to the oxygen regulator and the red hose to the fuel gas.
Sample questions by topic (in English)
Ask the examiner
Ask about this exam: why an answer is wrong, a grammar point, or “quiz me on …”.
Practice help only — no immigration, citizenship, legal or eligibility advice. For your application, ask the official authority. Answers can be wrong; check important facts. Chats aren't saved on our servers.
Questions about the Red Seal Welder
Is this the official Red Seal Welder?
No. Semplr is independent and not affiliated with the exam body. We write every question ourselves, in the official format and at the official level.
What is the real Red Seal Welder like?
Questions: 125 multiple choice, 4 options, one correct answer. Time: 4 hours. To pass: 70%. Question types: Knowledge and recall 40–50%, procedural and application 35–45%, critical thinking 10–20%. Provided: Welder formula sheet and acronym list. Languages: English and French. Delivered by: Your province's or territory's apprenticeship authority (Ontario: Skilled Trades Ontario, trade code 456A). Body: Red Seal Program, Canadian Council of Directors of Apprenticeship.
How is my practice marked?
Instantly. You see your score against the pass mark, and an explanation for every question — including the ones you got right.
Can I take it on my phone?
Yes. The whole mock exam works on a phone, and your progress is saved in your browser.
Ready for a full run?
One sitting, real timing, then your score against the pass mark.
Start the free mock exam