Which statement is true about respirator maintenance?

The statement about respirator cartridges needing to be stored in an airtight bag to maintain their effectiveness is correct because respirator cartridges contain materials that can absorb contaminants from the air, which would deactivate their filtering capacity. If not stored properly, moisture and other environmental factors can compromise the integrity of the cartridges, leading to reduced protection when they are eventually used.

Proper storage practices, such as keeping cartridges in airtight bags, help ensure that they remain functional and reliable when needed. It's also important for users to follow manufacturer guidance on storage conditions to extend the life and effectiveness of the respirator components.

In contrast, substitute canisters or cartridges may not provide the same protection and could lead to safety hazards. Regular inspections are important, but doing them only twice a year may not be sufficient depending on usage. Storing prefilters in a zip-closable bag does not specifically relate to maintaining cartridge effectiveness and can lead to confusion about how to properly manage all components of a respirator system.