To start the flow of oxygen, you must remove the _______ ______ and pull on the tubing.

• A. retainer clip
• B. mask
• C. valve cap
• D. cover plate

Answer: (A)

Starting oxygen flow relies on releasing the securing piece that holds the tubing in place, then pulling the tubing to open the flow. The item that fits this role is the retainer clip, which keeps the oxygen line from delivering flow until you remove it and pull the tubing to activate the valve. The mask is what you place on your face to receive the oxygen, not the mechanism that starts the flow. The valve cap and cover plate aren’t involved in initiating the flow of oxygen in this system.