During a renovation project, a plumber needs to cut several old galvanized steel pipes in a poorly ventilated basement. The cutting operation is anticipated to generate significant metal fumes and dust. Which respiratory protection is most appropriate for this task?

Question: During a renovation project, a plumber needs to cut several old galvanized steel pipes in a poorly ventilated basement. The cutting operation is anticipated to generate significant metal fumes and dust. Which respiratory protection is most appropriate for this task?

Answer options:

• N95 disposable particulate respirator ✅ Half-mask respirator with P100 particulate filters
• Surgical mask
• Supplied-air respirator (SAR)

Correct answer: Half-mask respirator with P100 particulate filters

Explanation: A half-mask respirator with P100 particulate filters provides effective protection against both fine particulate dust and metal fumes, which are common when cutting galvanized steel. An N95 might be insufficient for fumes, and a surgical mask offers minimal protection against fine particles and fumes. A SAR is typically for oxygen-deficient or highly toxic atmospheres, not primarily for fumes in a poorly ventilated space unless oxygen is an issue.