Which statement correctly differentiates qualitative from quantitative fit tests?

Which statement correctly differentiates qualitative from quantitative fit tests?

• A. Qualitative tests rely on instrumental measurements.
• B. Qualitative relies on sensory detection; quantitative uses a fit factor measurement.
• C. Qualitative tests measure fit factor numerically.
• D. Qualitative and quantitative tests are identical.

Answer: (B)

The difference being tested is how fit is determined. Qualitative fit testing relies on the wearer’s senses to detect a test agent (such as a bitter, sweet, or irritant substance) during the test. If the agent is detected, the fit is considered to fail; if not detected, the fit passes. Quantitative fit testing, on the other hand, uses instruments to measure how much leakage occurs and reports a numerical fit factor, giving an objective, numeric assessment of the seal. That’s why the correct statement is that qualitative relies on sensory detection, while quantitative uses a fit factor measurement. The other ideas don’t fit: qualitative tests aren’t based on instrumental measurements, and qualitative doesn’t produce a numerical fit factor. And qualitative and quantitative tests are not identical.

The difference being tested is how fit is determined. Qualitative fit testing relies on the wearer’s senses to detect a test agent (such as a bitter, sweet, or irritant substance) during the test. If the agent is detected, the fit is considered to fail; if not detected, the fit passes. Quantitative fit testing, on the other hand, uses instruments to measure how much leakage occurs and reports a numerical fit factor, giving an objective, numeric assessment of the seal.

That’s why the correct statement is that qualitative relies on sensory detection, while quantitative uses a fit factor measurement. The other ideas don’t fit: qualitative tests aren’t based on instrumental measurements, and qualitative doesn’t produce a numerical fit factor. And qualitative and quantitative tests are not identical.