When selecting a respirator size, you should perform a:

• A. Fit test
• B. Strength test
• C. Warm-up test
• D. Visual test

Answer: (A)

To ensure a respirator will actually protect you, you need to verify that the facepiece seals properly to your face. This is done with a fit test, which checks whether the size and model you chose can maintain an adequate seal under real-use conditions. During the test, you wear the respirator and the system measures leakage around the edges, using either a qualitative method (taste or odor cue) or a quantitative method (instrument measurement). If the seal isn’t sufficient, you try a different size or model and retake the test until you pass. Even after passing, always perform a seal check each time you put on the respirator. The other options don’t assess the actual seal or protection provided.