Which option can be used as an in-building emergency reserve substitute for EOSC?

• A. bulk oxygen source
• B. main line valve
• C. in-building emergency reserve
• D. emergency plan

Answer: (C)

Having an on-site backup that’s dedicated to emergency use is essential when the primary EOSC is unavailable. An in-building emergency reserve is designed specifically to act as a ready-to-use, local source of oxygen that can be hooked up quickly to patients during an EOSC outage. It remains available within the building, independent of the main supply, and is sized and maintained for emergency flow, ensuring that patient care isn’t interrupted while the EOSC issue is addressed.

Other options don’t fit as the substitute because they don’t provide a defined, readily accessible emergency reserve on-site. A bulk oxygen source can supply gas but isn’t automatically configured as an emergency reserve within the building. A main line valve is a control device for the existing pipeline, not a separate reserve. An emergency plan outlines procedures but does not supply gas itself.