Which of the following should NEVER be used to put out a grease fire?

Water should never be used to put out a grease fire because it can cause the fire to spread. When water is poured onto a grease fire, it doesn't extinguish the flames; instead, it can cause the hot oil to splatter and spread the burning grease over a larger area, potentially leading to a much larger and more dangerous fire.

Using the correct method for extinguishing grease fires is crucial for safety in a kitchen environment. The most effective way to put out a grease fire is to cover it with a metal lid to deprive it of oxygen, use a fire extinguisher specifically rated for grease fires, or pour baking soda or salt on it, which can help smother the flames without the risk of spreading. Understanding this distinction is vital for anyone working in food service or kitchen management to ensure a safe working environment.