Which NFPA standard deals with open-circuit self-contained breathing apparatus?

• A. NFPA 1982
• B. NFPA 1983
• C. NFPA 1981
• D. NFPA 1990

Answer: (C)

Open-circuit self-contained breathing apparatus are devices that deliver breathable air from a cylinder to the wearer while exhaled air is released to the surrounding environment. The standard that specifies the requirements for these open-circuit SCBA used by firefighters and emergency responders is NFPA 1981. It covers how the equipment must perform, how it is constructed, how it’s tested, how it’s labeled, and how it’s maintained, ensuring reliable protection in hazardous atmospheres and providing clear guidance on operation and limitations. The other NFPA standards listed address different safety topics and therefore don’t directly govern open-circuit SCBA requirements.