Which action should be performed first when preparing to use an AED?

• A. Remove clothing and expose chest
• B. Open and turn on
• C. Apply AED pads
• D. Deliver a shock

Answer: (B)

Turning on the AED is the first step because the device must be powered up to provide instructions, safety checks, and rhythm analysis. Once it's on, the AED guides you through the remaining steps—like exposing the chest as needed, placing the pads correctly on bare skin, and delivering a shock only if the device advises it. Starting with powering on ensures you’re following the device’s prompts and using the device safely and effectively.