How is the PBE activated?

• A. By pulling the neck area apart prior to placing it on a crewmember's head.
• B. By pressing a green activation button on the canister.
• C. By twisting the cap counterclockwise.
• D. By pulling a lever on the canister body.

Answer: (A)

Activation of the PBE is achieved by pulling the neck area apart prior to placing it on the crew member’s head. This tearing action breaks the hood’s seal and initiates the chemical reaction inside the canister that generates breathable oxygen for the wearer. There isn’t a button, cap twist, or lever to activate a PBE; the design relies on this simple mechanical tear to start the oxygen flow. Once activated, the hood supplies oxygen for a limited duration, enabling the wearer to breathe in smoky or oxygen-depleted conditions.