Boilermaker (420B)
Fabricate, assemble, and repair boilers, pressure vessels, and heavy plate steel structures.
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A Red Seal endorsement is a seal on your provincial or territorial trade certificate. It shows you have the knowledge and skills to practice your trade across Canada — earned by passing the interprovincial Red Seal exam.
What this trade covers
Fabricate, assemble, and repair boilers, pressure vessels, and heavy plate steel structures.
Exam format
- • 120 multiple-choice questions
- • 4-hour time limit
- • 70% required to pass
- • Closed-book
- • 120 questions, 4 hours, 70% to pass
- • Questions align with the Red Seal Occupational Standard (RSOS)
Exam blueprint (RSOS)
Questions are distributed across major work activities defined in the Red Seal Occupational Standard — the same breakdown used on the official exam.
Performs common occupational skills
Performs rigging and hoisting
Completes new construction
Peforms repairs, maintenance, upgrading and testing
Official Red Seal resources
Source material from the Red Seal Program — administered by the Canadian Council of Directors of Apprenticeship (CCDA).