Question 25Safety & Environmental - 1st Asst/Chief

The correct answer is D) conduction. In the context of fire spreading between compartments, conduction is the mechanism by which heat would transfer from one compartment to the adjacent compartment "B" through the common boundary or bulkhead. The heat generated in one compartment would be conducted through the metal or other solid materials of the bulkhead, allowing the fire to spread into the adjacent space by this mode of heat transfer. The other answer choices are incorrect because impingement refers to direct flame contact, radiation is heat transfer through electromagnetic waves, and convection is heat transfer by movement of hot gases or fluids - these modes of heat transfer are not the primary means by which the fire would spread from one compartment to the next as depicted in the illustration.