Core Units of Competency: Safety, Quality and Working Effectively
What the core units cover
The core of CPC30620 builds the non-negotiable foundation of painting work: work health and safety, environmentally sustainable work practices, quality and communication, planning and preparation, and the technical craft of surface preparation and paint application. Questions here test whether you understand why a control exists, not just that it does.
Concepts to master
- WHS hierarchy of control: eliminate, substitute, isolate, engineer, administrate, then PPE last. Questions often describe a hazard and ask for the highest control available, not the easiest one.
- Hazard identification and risk assessment: likelihood × consequence, consultation, reporting, and the difference between a hazard (potential harm) and a risk (chance of harm).
- MSDS/SDS and hazardous substances: labelling, storage, ventilation, and disposal of solvents, lead-based coatings and dust.
- Environmental controls: containment, bunding, waste segregation, VOC reduction, and correct disposal of washout.
- Work planning: interpreting drawings and specifications, sequencing, measuring and estimating quantities, and confirming scope with the client.
- Quality and communication: tolerances, inspection points, defect reporting, and written versus verbal instruction.
- Surface preparation and application: substrate identification, adhesion, priming, film build, and cure conditions.
Traps in questions
Watch for distractors that are real controls but not the highest (PPE instead of elimination), confusion between hazard and risk, and answers that ignore consultation. Another common trap is treating a surface-preparation step as optional when the specification makes it mandatory.
Worked example
A question describes painters sanding old lead paint indoors. The best answer is not "wear a respirator" - that is PPE, the last resort. The best answer is to eliminate or isolate the exposure: test for lead, use dust extraction or wet methods, contain the area, and only then use respiratory protection.
Rule of thumb
Ask: can the hazard be removed or separated from people before we protect the person? If yes, that is usually the correct option.