RAC Servicing (DomRAC) NC II study guide
RAC Servicing (DomRAC) NC II · Work through your exam, one topic at a time.
RAC Servicing (DomRAC) NC II is a Philippine national certificate for people who install, service, troubleshoot, and repair domestic refrigeration and air conditioning equipment - household refrigerators, window-type and split-type air conditioners, and similar small-capacity systems. It is typically pursued by technicians already working in appliance service shops, HVAC contractors, or building maintenance, and by trainees coming out of TVET programs who want their skills assessed against a recognized standard. The RAC Servicing (DomRAC) NC II study guide has 6 sections and about 2,198 words.
01Basic Competencies: Workplace Communication, Teamwork, Safety and Quality Standards
This domain covers the basic competencies assessed alongside the technical units: participating in workplace communication, working in a team, practising occupational health and safety, and applying quality standards. Assessors usually observe these behaviours during the practical test, so marks come from what you actually do - tag-out, toolbox talk, waste segregation, sign-off - not from reciting definitions.
392 words, about 2 min02Common Competencies: Tools and Equipment, Measurement, Materials Handling, Documentation
This domain tests whether you select the right tool, use it without damaging the equipment, measure to the tolerance the manual specifies, handle tubing, refrigerant and electrical materials correctly, and record what you did so the next technician can follow. A manifold gauge set must be rated for the system pressure (R-410A needs 800 psi class gauges, not R-22-only manifolds).
409 words, about 2 min03Core: Installation and Commissioning of Domestic Refrigeration and Air Conditioning Units
This is the highest-value core domain: site survey, mounting, piping, evacuation, charging and performance verification of split-type air conditioners and domestic refrigerators/chests. Estimate load from room volume, occupancy and glazing or use the manufacturer's sizing table; undersized and oversized units both fail.
373 words, about 2 min04Core: Servicing and Maintenance of Domestic Refrigeration and Air Conditioning Units
This domain covers planned preventive maintenance: cleaning, inspection, charge verification and documentation on units already in service. Record before-readings: ambient, suction and liquid pressures, air-on/air-off temperatures, amp draw.
327 words, about 2 min05Core: Troubleshooting and Repair of Domestic Refrigeration and Air Conditioning Systems
This domain tests systematic fault-finding: verifying the complaint, isolating the fault to electrical, refrigerant, airflow or control, confirming with instruments, then repairing and re-testing. Low suction pressure, high superheat, low subcooling: undercharge or leak - leak-search before charging.
325 words, about 2 min06Core: Refrigerant Handling, Recovery and Environmental Safety
This domain covers legal and environmental obligations plus the safe physical handling of refrigerants during recovery, charging and disposal. The Philippines is a party to the Montreal Protocol, so HCFC-22 is on the Article 5 phase-out schedule and virgin supply shrinks each year; the Kigali Amendment adds an HFC phase-down that affects R-410A and R-32 blends.
372 words, about 2 min