HVFD Engine Company Equipment Practice Test 2025 - Free Practice Questions and Study Guide

Question: 1 / 400

What does a positive pressure fan do?

It cools down areas in need of ventilation

It creates negative pressure by drawing air out

It blows fresh air into a structure for ventilation

A positive pressure fan is designed to blow fresh air into a structure, which is essential for effective ventilation during firefighting or other emergency situations. By introducing fresh air, the fan helps to displace smoke and toxic gases, thereby making the environment more survivable for any occupants and safer for rescue operations. This influx of air can also help lower temperatures within the structure by improving air circulation.

The focus of a positive pressure fan is to create a flow of air that pushes out the contaminated air, enhancing visibility and reducing the risks associated with smoke inhalation. In contrast, other fan types may function differently, either by exhausting air or creating a negative pressure environment, which is not the case with a positive pressure fan.

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It exhausts smoke from a building

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