Practice question · Numerical answer
How many controls should be in place before respiratory protection is relied on, in the hierarchy set out here?
Hints
- Wet methods, no dry sweeping, and extraction.
- Three.
Show the answer
3
Why
Three: wet methods at source, never dry-sweeping, and local exhaust ventilation. Respiratory protection is the fourth line and not the first, because it depends on fit, discipline and maintenance in a way that engineering controls do not.
Practise Health, Safety and Sustainability in the Workshop
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