What is the purpose of opening the doors and portholes in figure 2 of the illustration? SF-0013

Correct Answer: Option C — To allow venting of combustion products from the fire to the atmosphere.

Opening doors and portholes in a controlled manner facilitates the venting of smoke and hot combustion gases. This action reduces pressure buildup and improves visibility for firefighting teams, provided the ventilation is managed to prevent the fire from spreading or receiving an uncontrolled surge of oxygen.