Which item is used in negative-pressure ventilation?

Which item is used in negative-pressure ventilation?

• A. Smoke ejector
• B. Oxygen cylinder
• C. Water pump
• D. Fire extinguisher

Answer: (A)

Creating a safer, smoke-free environment inside a burning space is achieved with a smoke ejector. This high-volume fan pulls hot, smoky air out of the structure, lowering the interior pressure (negative pressure) so fresh air outdoors can be drawn in through openings. The result is faster removal of smoke and heat, better visibility, and easier access for firefighters and victims. The other items don’t move smoke: an oxygen cylinder provides breathing air, a water pump handles water, and a fire extinguisher delivers suppressant to fight the fire.