What method is used to determine whether a respirator fits properly?

The method used to determine whether a respirator fits properly is known as a fit test. A fit test is a rigorous process designed to ensure that a respirator forms a tight seal around the user’s face, which is critical for the effectiveness of the respiratory protection. During this test, various techniques are employed to measure the level of leakage around the respirator, ensuring that the user is adequately protected from airborne contaminants.

Proper fitting is crucial because if a respirator does not fit correctly, it can allow harmful substances to enter the mask, reducing its protective capabilities. Fit tests are typically conducted in a controlled environment and can involve different types of testing methods, including qualitative and quantitative approaches, to assess the fit accurately.

This emphasis on proper fit is why fit testing is mandated for certain workplaces, ensuring that employees are adequately safeguarded while performing their duties in potentially hazardous environments.