Why is fit testing important?

• A. Increases visibility
• B. Improves fragrance
• C. Ensures proper seal
• D. Reduces weight

Answer: (C)

Fit testing ensures a respirator forms a proper seal with the wearer’s face, which is essential for it to provide real protection. If the seal isn’t tight, air leaks around the edges and contaminants can get in, so the filter’s effectiveness is reduced regardless of its filtration quality. The test confirms that the specific model and size works for that person’s facial features, so the wearer actually receives the intended level of protection in real use. Regular fit testing may be required by safety rules to account for changes in the wearer or equipment, helping maintain consistent protection over time. The other options don’t address protection from inhaled hazards—fit testing isn’t about visibility, fragrance, or weight, but about preventing leaks and ensuring the respirator does its job.