A load of 3,500 BTU/hr is described as what?

• A. Mild hazard
• B. Obvious severe hazard
• C. Moderate hazard
• D. No hazard

Answer: (B)

Understanding how heat-release rates map to hazard levels helps here. The amount of heat a load can generate per hour shows how likely it is to ignite nearby materials and fuel a spreading fire. A load of 3,500 BTU/hr releases a substantial amount of energy—far enough above small, everyday loads to pose a clear risk to surrounding materials and the space. In this hazard classification, that level is categorized as an obvious severe hazard because it clearly represents a high fire-risk scenario that requires strict controls and protective measures. It’s not no hazard, since there is measurable energy; it’s not mild or moderate, since those describe much smaller energy releases with lower risk. Hence, the description for 3,500 BTU/hr is an obvious severe hazard.