Workplace Hazards and Controls
What this domain tests
This domain tests recognition and control of physical, chemical, biological, ergonomic and psychosocial hazards. Physical hazards include noise, vibration, heat, electricity, falls and confined spaces. Chemical hazards require substitution, ventilation, safe storage and exposure control. Biological hazards include bloodborne pathogens and mould. Ergonomic hazards include manual handling and repetitive work. Psychosocial hazards include excessive workload, violence and poor supervision.
Core rules
- Use the hierarchy of controls for every hazard group; PPE supplements, but does not replace, engineering and administrative controls.
- For chemicals, use safety data sheets, labels, local exhaust ventilation, spill containment and health surveillance where exposure is significant.
- Noise control starts with source reduction and isolation; hearing protection is last.
- Ergonomic controls adjust work height, reach, force, repetition and recovery time.
- Psychosocial risks should be assessed and controlled through work design, staffing, supervision and reporting systems.
Worked example
A worker degreases parts with solvent in a small room. The smell is strong and the worker reports headaches. A reasoned response is to substitute a less hazardous cleaner, add local exhaust ventilation, contain spills, monitor exposure if needed and provide suitable gloves and respiratory protection only as needed. The smell is not a reliable exposure measure, and PPE alone would not control inhalation risk.
Traps
Using odour as proof of safety; relying on PPE for solvent vapour; ignoring psychosocial hazards because they are not visible; treating ergonomics as only lifting technique; forgetting maintenance workers and cleaners.