Which statement about seal checks on tight-fitting respirators is accurate?

• A. Before each use of the respirator
• B. Only after finishing work
• C. Only if there is a suspected leak
• D. Never necessary

Answer: (A)

Tight-fitting respirators rely on a solid seal to keep contaminants from leaking around the edges, so it’s essential to verify that seal every time you put the mask on. A seal check done before each use confirms the respirator sits firmly on your face and that there are no leaks, which can be caused by facial movements, adjustments, or changes in your facial features or hair. Relying on a fit test from the past or skipping the check until you suspect a problem can leave you unprotected, since conditions can change from moment to moment. Therefore, the accurate practice is to perform the seal check before each use.