Certified Biomedical Equipment Technician (CBET) Practice Exam 2025 - Free Biomedical Equipment Technician Practice Questions and Study Guide

A negative pressure ventilation system is specifically designed to minimize the spread of airborne contaminants. This type of system operates by creating a vacuum effect within a designated area, which helps to ensure that air from the outside (and any potential contaminants) is drawn into the area only under controlled circumstances. By maintaining a lower pressure in the specific space compared to surrounding areas, it prevents contaminated air from escaping into adjacent spaces, thus reducing the risk of transmission of airborne infections or pollutants.

The other options, while relevant to various ventilation systems or air quality measures, do not specifically capture the primary function of a negative pressure system. For instance, eliminating unpleasant odors or providing de-humidification may be secondary effects or relate more to other types of ventilation systems aimed at improving overall air quality, but they are not the core purpose of a negative pressure ventilation system. Similarly, increasing the air exchange rate is more related to positive pressure systems or standard ventilation but does not directly relate to the unique characteristics of negative pressure systems.