What is the first step in using a fire extinguisher according to the PASS technique?

Answer: B — Pull the pin

The correct first step in using a fire extinguisher according to the PASS technique is to pull the pin. This action is essential because it unlocks the operating mechanism of the extinguisher, allowing you to activate it. Without pulling the pin, the extinguisher remains locked and cannot discharge its contents, making this step critical in addressing a fire effectively. Once the pin is pulled, you can aim, squeeze the handle, and then sweep the nozzle as needed to direct the extinguisher at the base of the fire. This systematic approach ensures that the extinguisher functions properly and maximizes its effectiveness in extinguishing the fire.