Question 2Safety & Environmental - Assistant Engineer

You are correct, the most effective method of extinguishing a class "A" fire is by quenching and cooling (option A). Class "A" fires involve ordinary combustible materials such as wood, paper, cloth, or plastics. To extinguish these types of fires, the most effective method is to quench the fire by removing the heat source and cooling the burning materials. This stops the chemical reaction that sustains the fire. Options B, C, and D are not as effective for class "A" fires, as they do not directly address the need to remove heat and cool the burning materials.