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.
Light (residential): 15x15' spacing; Ordinary (typical commercial): 12.5x12.5'; Extra: 10x10'. Understanding and applying code requirements correctly ensures your installations pass inspection and meet legal obligations in your jurisdiction.
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.
K-factor: flow (GPM) = K × √(pressure). K5.6 typical residential, K22.4 large commercial. Memorize this formula and practise substituting values — exam questions often give you three variables and ask you to solve for the fourth.
flow (GPM) = K × √(pressure)
H-W: friction loss (psi) = loss coefficient × (flow² / diameter⁴·87). Memorize this formula and practise substituting values — exam questions often give you three variables and ask you to solve for the fourth.
friction loss (psi) = loss coefficient × (flow² / diameter⁴·87)
Sizing: schedule method simplest (20/26 gpm per branch), hydraulic = most efficient. Memorize this formula and practise substituting values — exam questions often give you three variables and ask you to solve for the fourth.
hydraulic = most efficient
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.
Heads: upright = deflector above frame, pendent = below, sidewall = specialized pattern. Memorize this formula and practise substituting values — exam questions often give you three variables and ask you to solve for the fourth.
upright = deflector above frame, pendent = below, sidewall = spec
Wet-pipe: standard, simplest; dry-pipe: cold storage (freezing areas); pre-action: minimizes water damage. Understanding and applying code requirements correctly ensures your installations pass inspection and meet legal obligations in your jurisdiction.
RPZ: relief valve (more protection), annual test; DC: check valves only, 5-year test. 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.
Hydrostatic test: 1.5 × design pressure, 1-2 hours; reveals leaks before commissioning. When solving calculation questions, always identify your known variables first, select the correct formula, and double-check your units before calculating.
Flushing: essential to remove debris that would clog sprinkler orifices. On the job, a solid grasp of this concept means faster decisions, fewer errors, and work that passes inspection the first time.
Testing: confirm design flow/pressure, coverage area, alarm trips, sprinkler pattern. 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.