What is the function of HEPA filters in a PAPR used for asbestos work?

• A. To provide structural support
• B. To capture fine fibers and help maintain clean air for the wearer
• C. To generate dust for sampling
• D. To reduce battery consumption

Answer: (B)

HEPA filtration in a PAPR for asbestos work is designed to capture fine asbestos fibers from the air and deliver clean air to the wearer. The blower forces air through the high-efficiency filter, so what the wearer breathes has most particles removed. This not only reduces inhalation exposure but also helps maintain positive pressure inside the hood, which further minimizes any inward leakage of contaminated air. The other options don’t describe filtration or air purification: one refers to structural support, another to generating dust for sampling, and the last to battery use, none of which reflect the filter’s role.