What is released when reaching up and firmly pulling the mask/strap to your face on an aircraft with chemical oxygen?

What is released when reaching up and firmly pulling the mask/strap to your face on an aircraft with chemical oxygen?

• A. A pin
• B. A lever
• C. A clip
• D. A button

Answer: (A)

The action you’re testing is how the chemical oxygen system is activated. When you reach up and firmly pull the mask toward your face, you’re releasing a safety element that starts the oxygen flow. In these systems, a pin is part of the activation mechanism; pulling the mask frees that pin, triggering the chemical reaction inside the generator to produce oxygen. Once activated, the mask delivers oxygen to you through the tubing as you wear it over your nose and mouth with the strap securely in place. There isn’t a lever, clip, or button involved in starting the flow for this setup, which is why those options don’t apply.

The action you’re testing is how the chemical oxygen system is activated. When you reach up and firmly pull the mask toward your face, you’re releasing a safety element that starts the oxygen flow. In these systems, a pin is part of the activation mechanism; pulling the mask frees that pin, triggering the chemical reaction inside the generator to produce oxygen. Once activated, the mask delivers oxygen to you through the tubing as you wear it over your nose and mouth with the strap securely in place.

There isn’t a lever, clip, or button involved in starting the flow for this setup, which is why those options don’t apply.