Question 233Safety & Environmental - Assistant Engineer

The correct answer is C) close all openings to the area. To prevent the spread of fire by convection, it is important to isolate the fire by closing off all openings, such as doors, windows, and ventilation ducts, to the affected area. This helps to contain the fire and stop the spread of heat and smoke through convection, which is the transfer of heat through the movement of fluids, such as air. Closing off the area will limit the available oxygen supply and restrict the fire's ability to grow and spread. The other options, while important fire safety measures, do not directly address the issue of preventing fire spread by convection. Cooling the bulkhead (A) and removing combustibles (D) are also important, but they do not specifically target the convection mechanism. Shutting off electrical power (B) is a necessary safety step, but does not directly prevent the spread of fire.