Which statement best describes the overall purpose of the airflow monitoring system?

• A. To monitor and control airflow velocity and raise alarms if thresholds are exceeded
• B. To heat and humidify the air
• C. To ventilate outdoor spaces only
• D. To filter particulate matter from the air

Answer: (A)

Airflow monitoring systems exist to keep ventilation safe by actively tracking how air moves and using alarms to flag when that movement goes outside set, safe ranges. They measure airflow velocity (and often direction and pressure) and automatically adjust fans or dampers to maintain the desired ventilation, so contaminants like hazardous gases are diluted and removed. Alarms trigger when the airflow falls below or rises above thresholds, enabling quick corrective action to protect workers. Heating, humidifying, outdoor-only ventilation, and filtration are separate functions and don’t describe the overall purpose of monitoring airflow. So focusing on monitoring and controlling airflow velocity with alarms for threshold exceedance best captures why this system exists.