Personal Protective Equipment Ppe MEDIUM OSHA 29 CFR § 1910.134 App B-1 & 40 CFR § 170

How does an applicator perform a 'negative-pressure user seal check' on a tight-fitting half-facepiece elastomeric respirator?

Multiple Choice Options

A Cover the inhalation filter inlets with palms, inhale gently, and verify that the facepiece collapses slightly toward the face with no air leaks. ✓ OFFICIAL VERIFIED CORRECT ANSWER
B Cover the exhalation valve, exhale gently, and look for fogging on the safety glasses.
C Submerge the respirator completely in soapy water while wearing it.
D Blow compressed air into the valve cartridges.
✓ LEGAL EXPLANATION & STATUTORY RATIONALE
OSHA 29 CFR § 1910.134 App B-1 & 40 CFR § 170
Official Manual Chapter: Chapter 6: PPE

In a negative-pressure seal check, the user covers the cartridge inlets, inhales gently to create negative pressure, and ensures the mask collapses inward without inward leakage around the seal.

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