Red Seal Sheet Metal Worker 308A Exam: 2026 Weighting Guide
The Red Seal 308A Sheet Metal Worker Interprovincial Examination (IPSE) assesses your pattern development layout (parallel line, radial line, triangulation), CNC plasma cutting, SMACNA duct fabrication, and HVAC air system installation.
📐 308A Sheet Metal Exam Quick Blueprint Summary
- Total Exam Questions: 120 Multiple-Choice Questions
- Time Allowed: 4 Hours
- Passing Mark: 70% (84/120 correct)
- Official Standard: Red Seal Occupational Standard (RSOS), red-seal.ca
1. Official Major Work Activity (MWA) Weighting Breakdown
| Major Work Activity (MWA) | Weighting (%) | Questions |
|---|---|---|
| MWA A: Performs Common Occupational Skills Shop safety, welding safety (GMAW, GTAW, resistance spot), sheet metal hand/power tool care, math/geometry |
12% | 14 Qs |
| MWA B: Performs Pattern Development & Layout (Highest Weighting!) Parallel line (elbows, tees), radial line (cones, tapers), triangulation (square-to-rounds, transitions), stretchouts |
34% | 41 Qs |
| MWA C: Fabricates Sheet Metal Components Seams (Pittsburgh, snap lock, grooved), edges, roll forming, brakes, dampers, turning vanes, louvers |
22% | 26 Qs |
| MWA D: Installs Air Distribution Systems (HVAC & Exhaust) SMACNA duct hangers, fire dampers, flexible connectors, VAV boxes, rooftop curbs, acoustical lining |
20% | 24 Qs |
| MWA E: Installs Architectural Sheet Metal & Roofing Flashing, counter-flashing, standing seam metal roofs, gutters, downspouts, expansion joints |
12% | 15 Qs |
2. Sample Practice Question
Practice Question: Which pattern development method must a sheet metal worker use to lay out an offset transition fitting from a rectangular duct to a round spiral duct?
A) Parallel Line Development
B) Radial Line Development
C) Triangulation Development
D) Direct Step-Off Method
Correct Answer: C) Triangulation Development (Used for all non-symmetrical transitions where surfaces form compound angles between different cross-sectional geometries, such as square-to-round fittings).
How to Study for Sheet Metal Worker Red Seal
Review pattern drafting calculations and SMACNA duct standards on Red Seal Pass Sheet Metal Prep.
Next step for your Sheet Metal Worker (308A) exam
Knowing the weighting is half of it. The other half is finding out which Major Work Activities you are actually weak in.
Sheet Metal Worker (308A) practice exam · Full timed mock exam
🎧 Watch & Listen: 30 Sheet Metal Worker (308A) Practice Questions & Worked Answers
Weighted to the official Red Seal Sheet Metal Worker (308A) exam breakdown, read aloud with a 5-second pause before each worked answer and code explanation.
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Is Sheet Metal Worker (308A) certification required where you work? Check the rules for British Columbia, Ontario or Alberta.