For all positive pressure, atmosphere-supplying respirators, which fit-testing methods may be used?

• A. Qualitative only
• B. Quantitative only
• C. Either qualitative or quantitative
• D. Neither method is required

Answer: (C)

The main idea here is that positive-pressure atmosphere-supplying respirators can be fit-tested using either approved method. Qualitative fit testing uses the wearer’s senses to detect a test agent (taste, smell, or irritation) and provides a pass/fail result based on perception. It’s straightforward, inexpensive, and useful when you want a quick check. Quantitative fit testing, on the other hand, uses instruments to measure actual leakage around the face seal and gives a numerical fit factor, offering objective data that can be documented for records. Because these respirators supply air and maintain positive pressure inside the facepiece, both approaches reliably assess whether the seal is adequate. The choice between them often comes down to resources and policy—either method is acceptable. Limiting to only one method or saying no method is required would ignore this flexibility and the standard practice.