NFPA-99 Practice Exam

Which systems are not permitted to be located in an outdoor enclosure?

1. Bulk cryogenic liquid system

2. Manifolds for cryogenic liquid cylinders

3. Manifolds for gas cylinders, without a reserve

4. Med air compressor supply source

The correct answer is: Bulk cryogenic liquid system

The bulk cryogenic liquid system is considered to be less suitable for placement in an outdoor enclosure due to the specific safety and operational standards that must be maintained. These systems are often complex and require careful monitoring for temperature and pressure control as well as risk of leaks, which can be more challenging to manage effectively in an outdoor environment. In addition, outdoor enclosures may present environmental challenges such as exposure to extreme weather conditions, which can affect the integrity and functionality of the system components. The NFPA 99 guidelines are designed to ensure safe practices for medical gas systems, and the inability to safely monitor and maintain the integrity of a bulk cryogenic liquid system outside makes it unsuitable for outdoor installations. The other options, such as manifolds for cryogenic liquid cylinders and medical air compressor supply sources, may have specific guidelines that allow for their placement in outdoor enclosures, depending on their use and the structural design of the facility.