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.
Natural draft: hot flue gases rise; draft hood allows air entry if draft fails. On the job, a solid grasp of this concept means faster decisions, fewer errors, and work that passes inspection the first time.
Induced draft: fan vents gas; more efficient, allows longer venting runs. On the job, a solid grasp of this concept means faster decisions, fewer errors, and work that passes inspection the first time.
Pilots: standing (safety control), intermittent (spark, energy-efficient), hot surface (glow bar). 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: evacuate, no sparks/flames, call gas company emergency line immediately. On the job, a solid grasp of this concept means faster decisions, fewer errors, and work that passes inspection the first time.
Commissioning: verify all controls work, flame color (blue), draft adequate, safety devices responsive. 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.
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.
Venting: sized per rise height, lateral runs; maintain temperature for draft. 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.
Sealed combustion: two-pipe system (in/out); high-efficiency, safe in tight homes. 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.
Bonding: copper strap from gas pipe to water/electrical ground ensures safety. 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.
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.
Class B: residential gas appliances; maintain safe installation, proper venting. 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.
Test: 0.5" WC held 10 minutes; soap test for leaks; if fails, locate/repair. 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.