Respirator fit test: How often should a respirator fit test be performed after the initial fitting?

• A. Once a year
• B. Every month
• C. Only at first use
• D. Never

Answer: (A)

A respirator fit test is about ensuring the seal between the face and the respirator remains effective, because the level of protection depends on that tight seal. After the initial fitting, the test should be repeated at least once a year to confirm the fit hasn’t changed as facial features or hair, weight, or dental work can alter how the mask seals. If you switch to a different respirator model or there are noticeable changes to the wearer’s face, a new fit test is required before use. Monthly testing or testing only at first use would not reliably maintain protection, and never testing would ignore changes that can affect fit. So, the best practice is to perform a fit test annually.