What is one of the primary requirements for wearing a respirator?

Fit testing is a primary requirement for wearing a respirator because it ensures that the respirator provides an adequate seal to the wearer’s face, preventing harmful contaminants from entering the breathing zone. This process is crucial for confirming that the respirator is appropriate for the individual's facial structure and can perform effectively in protecting against airborne hazards.

Without proper fit testing, there is a risk of leakage around the edges of the mask, which can significantly compromise safety and reduce the effectiveness of the respiratory protection being provided. Fit tests can be either qualitative or quantitative and are mandated by occupational safety regulations to ensure compliance and the health and safety of individuals in environments where respiratory hazards may be present.