Year 2 Exam Study Guide — master what the exam actually tests, concept by concept.
Safety is the first thing assessors look for in any trade professional. This section covers the regulations, procedures, and practices that protect you and those around you on the job. Every answer here reflects a real-world scenario where the wrong choice has consequences.
B149.1: gas piping, appliances, venting, safety devices in residential/commercial. Understanding and applying code requirements correctly ensures your installations pass inspection and meet legal obligations in your jurisdiction.
Regulator: controls outlet pressure maintaining safe, constant appliance inlet conditions. Safety regulations exist because the consequences of ignoring them are severe — injury, death, or legal liability. Know these requirements the way you know your own name.
Codes and standards define what's legal, what's safe, and what passes inspection. Every trade has its own regulatory framework, and the Red Seal exam tests whether you can navigate and apply those rules to real scenarios.
AGA (American Gas Association) or ULC (Underwriters' Laboratories of Canada) certification required. On the job, a solid grasp of this concept means faster decisions, fewer errors, and work that passes inspection the first time.
Calculation questions test your ability to apply trade math to real scenarios. Each formula has a purpose — know what it solves, what the variables represent, and how to check whether your answer makes sense.
Longest run: pressure drop ≤ 0.5" WC in main, 0.3" branch per code tables. Understanding and applying code requirements correctly ensures your installations pass inspection and meet legal obligations in your jurisdiction.
Pressure test: 1/2 " WC (0.02 psi) in supply; hold without pressure drop; no soap bubbles. On the job, a solid grasp of this concept means faster decisions, fewer errors, and work that passes inspection the first time.
Sizing: calculate load, select equipment matching input, verify all utilities adequate. On the job, a solid grasp of this concept means faster decisions, fewer errors, and work that passes inspection the first time.
Understanding the tools, materials, and equipment of your trade — their properties, ratings, and proper applications — is what separates someone who works safely and efficiently from someone who causes problems.
Categories: Type B (natural draft), Cat I (natural), Cat II (condensing safe to vent), Cat III/IV (sealed systems). Safety regulations exist because the consequences of ignoring them are severe — injury, death, or legal liability. Know these requirements the way you know your own name.
CSST: bonding required per B149.1; prevents induced current damage. On the job, a solid grasp of this concept means faster decisions, fewer errors, and work that passes inspection the first time.
How you do the work is just as important as what you do. This section covers the procedures, techniques, and best practices that define journeyperson-level competence in your trade.
Combustion test: CO ≤100 ppm (safe), CO₂ 6-12% (efficient), adjust burner if needed. Safety regulations exist because the consequences of ignoring them are severe — injury, death, or legal liability. Know these requirements the way you know your own name.
Leak detection: soap solution for visible leaks, electronic sniffer for trace amounts. On the job, a solid grasp of this concept means faster decisions, fewer errors, and work that passes inspection the first time.
All 10 exam concepts from this guide — test your recall before you sit the exam.