What are the two kinds of tests for ensuring a safe fit of a respiratory device?

The correct answer identifies the two primary types of fit tests used to ensure a safe and effective fit of respiratory devices: qualitative and quantitative.

Qualitative fit testing is a pass/fail test that relies on the wearer’s sensory response to detect the presence of a test agent, typically a harmless aerosol or vapor. This method assesses whether the respirator forms a proper seal on the wearer’s face and is often performed with various challenge agents, such as saccharin or bitter solutions. The effectiveness of the fit is based on the individual's ability to taste or smell the agent while wearing the respirator.

Quantitative fit testing, on the other hand, uses instruments to measure the actual amount of leakage around the respirator seal. This method provides a numeric result that quantifies the fit factor, giving a more precise measurement of how well the respirator fits the wearer. Equipment such as a particle counting device or a pressure differential measurement is utilized during this testing process.

In contrast, other options like visual and physical testing do not appropriately address how to measure the effectiveness of the respirator's seal. Written and practical assessments can be important in training and skills evaluation but are not specific to fit testing itself. Similarly, active and passive are not standard terms used in the