Performs safety-related functions
The safety domain tests hazard recognition, the legal duties on employers and workers, and the controls for falls, access equipment, hazardous products and confined spaces. Expect questions that describe a task and ask what must be done first, what the minimum control is, or who is responsible.
Duties and the three rights
Workers in every Canadian jurisdiction have the right to know about hazards, to participate in health and safety, and to refuse work they believe is unsafe. Employers must provide training, supervision, PPE and, where required, a written hazard assessment. Occupational health and safety law is provincial or territorial, so the fall-protection trigger height and guardrail dimensions differ by jurisdiction; the exam tests the principle and the widely shared values. WHMIS 2015 obliges a supplier label, a Safety Data Sheet and worker training before a controlled product is used.
Fall protection and access
Most jurisdictions require fall protection at 3 m (10 ft) in general construction, with lower triggers for specific work. Guardrails used as fall protection need a top rail near 1.0 m, a mid-rail and a toe board, and must resist the design load. Ladders stand at 4:1, are tied off top and bottom, extend about 1 m past the landing, and are climbed facing the rungs with three-point contact. Scaffolds are fully planked, guarded above the trigger height, and tied in or outriggered when the height exceeds three times the base width.
Health hazards
Wet-cutting or vacuum extraction controls silica dust from concrete and fibre-cement. Wood dust, solvent vapour, asbestos in pre-1990 material and lead paint need assessment before work starts; respiratory protection is the last line of defence, not the first.
Worked example
A carpenter must reach an eave 6.0 m above grade. Working height divided by four gives the base distance: 6.0 ÷ 4 = 1.5 m from the wall. Because the ladder must extend about 1 m above the eave, the length along the wall is roughly 7.0 m, so a 7.5–8 m ladder is selected - a 6 m ladder cannot reach. The base is footed, the top tied off, and the area barricaded, because a steeper 1:1 set can kick out.
Traps
Confusing handrail height (about 900 mm) with guardrail height; quoting one province's fall-protection trigger as national law; and treating PPE as the first control rather than the last.