🔍 Key Concepts

• Basic operation sequence of portable fire extinguishers (safety step before discharge) • Design and normal use of CO2 fire extinguishers • Purpose of safety devices such as pins and seals on extinguishers

💭 Think About

• Before any extinguisher can discharge, what needs to be done to make it possible for the handle/valve to move? • Which of the listed actions is specifically a safety measure to prevent accidental discharge during storage and handling? • Think about how you would pick up and aim the extinguisher: what step must logically happen before you can open or squeeze anything to release the agent?

✅ Before You Answer

• Identify which option is a safety-lock removal step versus an operating step • Consider which option must be done prior to any discharge control (valve operation or squeezing handles) • Recall standard mnemonic for extinguisher use (often taught as PASS) and focus on the first letter/action