Final answer:
The correct answer to the question of approved methods for labeling medical gas systems is D. All of the above, which include adhesive stickers, color-coded pipes, and engraved metal tags.
Step-by-step explanation:
The question asks about the approved methods for labeling medical gas systems. These systems must be clearly identified to ensure safety and compliance with health and safety regulations. The approved methods for labeling include:
- Adhesive stickers that can be affixed directly to the gas cylinders or pipes.
- Color-coded pipes, which provide a quick visual identification of the type of gas contained within the pipe.
- Engraved metal tags, which are durable and permanently affixable to the gas cylinders or the medical gas supply system.
The correct answer to the question is D. All of the above. Each one of these methods is an acceptable way to label medical gas systems according to industry standards and regulations.