Which step involves the use of wet materials in the under floor fire drill?

In an under floor fire drill, the step that involves the use of wet materials is the attack phase. During this stage, personnel are tasked with directly engaging the fire to suppress it. Using wet materials, such as water or fire retardant substances, is essential for effectively extinguishing flames and lowering the temperature of the affected area. The attack strategy usually aims to reach the fire quickly and apply the appropriate extinguishing agents to minimize the damage and mitigate the risk of the fire spreading.

Additionally, this phase is critical because the application of wet materials can help to cool down hotspots, thereby preventing re-ignition and aiding in overall fire control. A thorough understanding of this phase is vital for ensuring safety and effectiveness during fire suppression efforts.