What should be the size of the exhaust opening in relation to the ventilation opening?

The correct choice indicates that the size of the exhaust opening should be 1-2 times the size of the ventilation opening. This ratio is crucial in firefighting operations, particularly when dealing with smoke and heat venting from a structure. When the exhaust opening is larger than or equal to the ventilation opening, it facilitates effective smoke and heat removal from the environment.

This design ensures that there is enough negative pressure created, allowing for proper airflow dynamics within the structure during firefighting operations. A larger exhaust opening aids in creating a more efficient pathway for smoke and heat to escape, while also supporting the overall safety of the firefighters and any individuals inside the building.

In this scenario, options that suggest smaller or equal openings would not facilitate appropriate ventilation and could lead to dangerous conditions, as they would impede the efficient removal of hazardous smoke and heat from the area. Thus, maintaining an exhaust opening that is adequately sized in relation to the ventilation opening is fundamental for effective fire control and safety.