Certified Healthcare Safety Professional (CHSP) Practice Exam

Which method involves adding clean air to dilute contaminant concentration?

1. Dilution Ventilation

2. Exhaust Ventilation

3. Recirculation Ventilation

4. Static Ventilation

The correct answer is: Dilution Ventilation

The method that involves adding clean air to dilute contaminant concentration is dilution ventilation. This approach is fundamental in maintaining indoor air quality and ensuring that any airborne contaminants are effectively reduced. By introducing fresh air into a space, dilution ventilation lowers the concentration of pollutants, such as chemicals, dust, or biological agents, thereby enhancing the overall safety of the environment. In practical applications, dilution ventilation is commonly used in healthcare settings, laboratories, and industrial environments where hazardous materials may be present. The goal is to keep contaminant levels below acceptable limits by continuously mixing fresh air with contaminated air. This process helps to mitigate the potential health risks associated with exposure to airborne hazards. The other methods, while they play important roles in ventilation systems, operate under different principles. Exhaust ventilation focuses on removing contaminated air from a space without necessarily introducing fresh air, while recirculation ventilation involves filtering and reusing air rather than diluting it with fresh air. Static ventilation refers to passive airflow processes and does not actively introduce clean air, thus not effectively diluting contaminants.