What must be posted on the door when oxygen is in use?

• A. "No oxygen" sign
• B. "Oxygen in use" and "No smoking" signs
• C. "Oxygen safe zone" sign
• D. "Oxygen warning" sign

Answer: (B)

When oxygen is in use, it is essential to post both "Oxygen in use" and "No smoking" signs on the door to alert individuals in the vicinity about the presence of oxygen and the associated fire hazards. Oxygen supports combustion, meaning that it can cause fire to burn more intensely if a flame comes into contact with it. By displaying these signs, you help ensure the safety of both residents and staff by minimizing the risk of fire.

Posting a sign indicating "Oxygen in use" communicates to everyone that precautions must be taken around any potential ignition sources, while the "No smoking" sign further emphasizes the need to avoid actions that could ignite a fire. This dual approach helps maintain a safe environment when oxygen therapy is being administered, as it increases awareness and compliance with safety protocols.