Mold Remediation Certification Practice Exam

What equipment is used to evacuate air out of a containment area to create a pressure differential?

1. Air scrubber

2. Negative air machine (NAM) or Air Filtration Device (AFD)

3. Dehumidifier

4. Blower fan

The correct answer is: Negative air machine (NAM) or Air Filtration Device (AFD)

The equipment that is specifically designed to evacuate air out of a containment area in order to create a pressure differential is the negative air machine (NAM) or air filtration device (AFD). These machines pull air from the contained space and filter it before exhausting the cleaned air outside. This process helps maintain negative pressure within the containment area, preventing the migration of mold spores and other contaminants to uninfected areas. The creation of a pressure differential is crucial during mold remediation, as it minimizes the risk of spreading hazardous materials during the cleanup process. In contrast, while an air scrubber also plays an important role in mold remediation by filtering air, it does not necessarily manage air pressure differentials as effectively as a negative air machine. Other options, such as dehumidifiers and blower fans, serve different purposes and do not specifically create a negative pressure environment.