What is the expected outcome of using a Class B bulkhead during a fire incident?

Using a Class B bulkhead during a fire incident is focused on fire containment and mitigation. The key outcome of employing a Class B bulkhead is to prevent the spread of fire for a specific duration, allowing time for firefighting efforts and evacuation as necessary. Class B bulkheads are designed to resist fire and limit the movement of flames and heat through the comparted areas, thereby slowing down the fire's progression.

While options suggesting complete evaporation, reduction of fire size, or immediate extinguishment sound appealing, these outcomes are not characteristics of a Class B bulkhead. Instead, the bulkhead's role is to hold off the fire’s spread, buying critical time for responders to act and tackle the incident more effectively. The control of the fire’s movement is vital in maintaining safety and enhancing the chances of successful firefighting operations.