Indoor Air sciences CSMI Practice Exam

Which machine should be used to create pressure differential?

1. Manometer

2. Negative Air Machine

3. Air Scrubber

4. Zip pole

The correct answer is: Negative Air Machine

The ideal choice for creating a pressure differential in a given space is a negative air machine. This equipment is specifically designed to control air movement through a designated area by exhausting air from that space while drawing in fresh air from permissible sources. By doing this, the negative air machine effectively lowers the air pressure inside the room compared to adjacent spaces, thus creating a pressure differential. This pressure differential is crucial in various applications such as mold remediation, asbestos abatement, and other restoration activities where containment of contaminants is necessary. The lower pressure inside the designated area prevents the spread of airborne pollutants to other areas, ensuring a safer environment for workers and inhabitants. In contrast, the other options have different primary functions. A manometer measures air pressure but does not create a differential. An air scrubber is used for cleaning and filtering air but also does not create a pressure difference intentionally. A zip pole typically refers to equipment used to create physical barriers and does not have the capability to manipulate pressure differentials. Therefore, the negative air machine is the most effective equipment for creating the desired pressure differential.