| Content Areas | % of Questions |
|---|---|
| Terminology & Fundamentals | 13 |
| Theory & Principles | 13 |
| Plan Reading | 13 |
| Operating Principles | 8 |
| Materials | 7 |
| Pipe Sizing & Installation | 20 |
| Appliances | 14 |
| Vents | 5 |
| Special Requirements | 7 |
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