What type of test must each firefighter undergo to ensure proper sealing of the SCBA mask?

The type of test that ensures proper sealing of the SCBA (Self-Contained Breathing Apparatus) mask is the fit test, which can be either qualitative or quantitative. A fit test is essential for determining how well the mask fits an individual firefighter's face, ensuring that there are no leaks that could allow contaminants to enter the mask.

Qualitative fit tests typically involve the use of a test substance (like a bitter or sweet solution) to see if the firefighter can detect its presence inside the mask, which would indicate a poor fit. Quantitative fit tests, on the other hand, use specialized equipment to measure the amount of leakage into the mask, providing a numerical result of the fit quality.

Both types of tests are critical for maintaining safety and efficacy while using SCBA gear in environments with hazardous air quality, as a proper seal protects firefighters from inhaling harmful substances during operations. Other options, such as awareness training or physical endurance tests, focus on different aspects of firefighter readiness and do not directly assess the fit and seal of respiratory protection equipment.