Which statement differentiates NIOSH-approved filtering facepiece respirators (N95) from elastomeric respirators in terms of use and maintenance?

• A. N95 are for chemical hazards; elastomeric for biological hazards.
• B. N95 is reusable with cartridge replacement; elastomeric is disposable.
• C. N95 are for chemical hazards; elastomeric for biological hazards.
• D. N95 are elastomeric; elastomeric are disposable.

Answer: (C)

The key idea is how each respirator is used over time and kept in working condition. NIOSH-approved N95 filtering facepieces are designed for one-time or very short-term use; once they’re worn, soiled, or damaged, they’re typically discarded rather than cleaned for reuse. Elastomeric respirators are built to be reused, with replaceable filters or cartridges, and they require cleaning and disinfection between uses, regular inspection of the seal and straps, proper storage, and periodic replacement of filters or cartridges based on the hazard and manufacturer guidance. This difference in maintenance and reuse is what sets them apart in practical use. In addition, while N95s primarily provide particulate protection, elastomeric respirators can be configured with gas/vapor cartridges or higher-efficiency particulate filters, which is why their maintenance pattern is geared toward ongoing, reusable use.