After rough handling, how should you validate facepiece seal remains effective?

After rough handling, how should you validate facepiece seal remains effective?

• A. Visually inspect the facepiece without functional testing.
• B. Clean the facepiece and rely on a seal due to prior fit.
• C. Re-run positive- and negative-pressure seal checks to confirm a proper seal.
• D. Replace the facepiece before testing.

Answer: (C)

After rough handling, you need to verify the facepiece still seals properly by performing functional seal checks, not just a visual look. Re-run both tests—negative-pressure and positive-pressure seal checks—to confirm there are no leaks around the facepiece. For the negative-pressure check, put the facepiece on and gently inhale while keeping the facepiece pressed to your face. The facepiece should slightly collapse inward and stay sealed; if you can feel or hear air leaking around the seal, there’s a leak that needs correcting. For the positive-pressure check, exhale gently with the facepiece still on and pressed to the face (you may block the exhalation valve as directed by your protocol). The facepiece should maintain a slight positive pressure without air escaping at the seal; any audible or felt leaks indicate the seal isn’t effective. If either test shows a leak, adjust the fit or inspect/replace worn components and retest until both checks pass. Only then is the seal considered effective. Visual inspection alone isn’t enough because it doesn’t reveal hidden leaks; relying on prior fit after cleaning isn’t reliable after rough handling, and replacing the facepiece isn’t necessary unless damage is found.

After rough handling, you need to verify the facepiece still seals properly by performing functional seal checks, not just a visual look. Re-run both tests—negative-pressure and positive-pressure seal checks—to confirm there are no leaks around the facepiece.

For the negative-pressure check, put the facepiece on and gently inhale while keeping the facepiece pressed to your face. The facepiece should slightly collapse inward and stay sealed; if you can feel or hear air leaking around the seal, there’s a leak that needs correcting.

For the positive-pressure check, exhale gently with the facepiece still on and pressed to the face (you may block the exhalation valve as directed by your protocol). The facepiece should maintain a slight positive pressure without air escaping at the seal; any audible or felt leaks indicate the seal isn’t effective.

If either test shows a leak, adjust the fit or inspect/replace worn components and retest until both checks pass. Only then is the seal considered effective.

Visual inspection alone isn’t enough because it doesn’t reveal hidden leaks; relying on prior fit after cleaning isn’t reliable after rough handling, and replacing the facepiece isn’t necessary unless damage is found.