Certified Hyperbaric Technologist Practice Test

Before 1980, what was a common cause of fires in hyperbaric chambers?

1. Electrical sources

2. Oxygen leaks

3. Cigarette smoking

4. Excessive heat

The correct answer is: Electrical sources

The correct answer highlights that before 1980, electrical sources were a common cause of fires in hyperbaric chambers due to the unique environment created by elevated pressures and high concentrations of oxygen. In hyperbaric chambers, the presence of high oxygen levels greatly increases the risk of combustion. Electrical components, if improperly insulated or malfunctioning, can generate sparks or heat, leading to ignition in an atmosphere that is already more flammable than normal air. In contrast, while oxygen leaks could theoretically pose a risk for fires, they primarily lead to an increased concentration of oxygen in certain areas rather than being direct ignition sources. Cigarette smoking would typically be prohibited in such environments due to the fire hazards associated with both the act of smoking and the materials involved. Excessive heat can certainly cause issues in any environment, but it's the combination of electrical faults and the flammable nature of high-oxygen environments that significantly raises the risk of fire incidents in hyperbaric chambers.