American Chemical Society (ACS) Laboratory Safety Practice Test

The mnemonic PASS is specifically designed to help individuals remember the essential steps for effectively using a fire extinguisher in an emergency situation. Each word corresponds to a critical action:

- **Pull**: This step involves pulling the pin located at the top of the fire extinguisher, which unlocks the mechanism and prepares it for operation.

- **Aim**: Once the pin is pulled, you should aim the extinguisher nozzle at the base of the fire. Aiming at the flames will not be effective; targeting the base helps to extinguish the fire where it is originating.

- **Squeeze**: This action involves squeezing the handle to release the extinguishing agent. It is important to apply pressure steadily for effective dispersion.

- **Sweep**: Finally, sweeping the nozzle side to side across the base of the fire allows for an even distribution of the extinguishing agent, maximizing its effectiveness on the fire.

This clear and concise method promotes proper technique in using a fire extinguisher, ensuring that individuals act efficiently and effectively during a fire emergency. Other options in this question present alternatives that do not align with the established fire safety protocols, which could lead to confusion or less effective fire suppression.