Certified Hyperbaric Technologist Practice Test

What characterizes a Class C chamber defined by NFPA 99?

1. Multiple human occupancy

2. No human occupancy

3. Single human occupancy

4. Designated for emergency use

The correct answer is: No human occupancy

A Class C chamber, as defined by NFPA 99, is characterized by the fact that it is not designed for human occupancy. This classification applies to hyperbaric facilities where the chamber is intended only for the purposes of testing or research, not for treatments involving patients. The implications of this designation are significant, as it influences the safety protocols, operational standards, and the equipment necessary for the functioning of the chamber. In contrast, chambers that accommodate human occupancy, whether single or multiple, fall under different classifications that require specific safety and operational regulations to protect the health and well-being of those inside. Additionally, emergency use chambers are designed with particular features and functions to serve urgent medical needs, further distinguishing them from Class C chambers. This understanding of the NFPA 99 classifications is essential for compliance and safety in hyperbaric medicine.