Year 2 Exam Study Guide — master what the exam actually tests, concept by concept.
The right tool and the right material make the difference between a professional finish and a callback. This section covers proper equipment selection, material properties, and the technical specifications that apply to your trade.
Sealed system: measure pressure, temp, amps; low pressure/high current = compressor failure. Memorize this formula and practise substituting values — exam questions often give you three variables and ask you to solve for the fourth.
high current = compressor failure
Defrost controls: timer (simple), thermostat (responsive), heater melts ice. Material selection directly affects performance, code compliance, and longevity. Using the wrong type can fail an inspection or create a hazard down the line.
Direct: motor directly coupled; belt: uses pulleys; belt systems simpler to repair. On the job, a solid grasp of this concept means faster decisions, fewer errors, and work that passes inspection the first time.
Inlet valve: energized by timer/control board; typical failure = no fill. Memorize this formula and practise substituting values — exam questions often give you three variables and ask you to solve for the fourth.
typical failure = no fill
Technique and procedure define the quality of service work. Whether you're cutting hair, preparing food, or servicing an appliance — the professional standard is defined by how the work is done, not just what is done. These questions test procedural correctness.
Igniter: ceramic element glows, ignites gas; glow bar maintains heat. Knowing what each component does — not just what it is — helps you diagnose failures, specify replacements, and explain your work to inspectors and clients.
All 5 exam concepts from this guide — test your recall before you sit the exam.