Basic Firefighter Written Practice Exam

What equipment is specifically used for negative-pressure ventilation?

1. Exhaust Fans

2. Smoke Ejectors

3. High-Volume Fans

4. Air Movers

The correct answer is: Smoke Ejectors

Negative-pressure ventilation is a technique used to remove smoke, heat, and toxic gases from a structure by creating lower air pressure inside compared to the outside atmosphere. This process allows external air to flow in while pushing contaminants out. Smoke ejectors are specifically designed for this purpose. They are powerful enough to create the necessary negative pressure and efficiently expel smoke and gases from the fire area, thus helping to improve visibility and the working environment for firefighters. While exhaust fans, high-volume fans, and air movers contribute to ventilation efforts, they do not possess the specialized design or functionality required to effectively create a negative pressure situation in the same manner as smoke ejectors. Exhaust fans typically aim to remove air but do not focus on creating the necessary pressure differential like smoke ejectors do.