Respirator fit test

A respirator fit test checks whether a respirator properly fits the face of a user. A fitting respirator must be able to separate a user's respiratory system from ambient air.

The test involves tightly pressing the mask flush against the face (without gaps) to ensure an efficient seal on the mask perimeter. Protection depends on an airtight seal, making testing necessary before entering contaminated air.

Mask size and shape correctly fitted to the user's face, provides better protection in hazardous environments.

Facial hair such as beards can interfere with proper fit.

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