Which class of fire is it safe to extinguish using water?

Which class of fire is it safe to extinguish using water?

• A. Class B
• B. Class A
• C. Class C
• D. Class D

Answer: (B)

Water is an effective extinguishing agent for Class A fires, which involve ordinary combustible materials such as wood, paper, cloth, and some plastics. When water is applied to these types of fires, it helps cool the burning materials and reduce the temperature below the ignition point, ultimately extinguishing the flame. Class B fires, which involve flammable liquids like gasoline, oils, or solvents, can spread rapidly if water is used, as it can cause the liquid to splash and spread the fire. Class C fires involve energized electrical equipment, and using water poses the risk of electrical shock, as water conducts electricity. Class D fires involve combustible metals that can react violently with water, making it hazardous to use water in those situations. Thus, the use of water is both safe and effective for Class A fires, making it the appropriate choice.

Water is an effective extinguishing agent for Class A fires, which involve ordinary combustible materials such as wood, paper, cloth, and some plastics. When water is applied to these types of fires, it helps cool the burning materials and reduce the temperature below the ignition point, ultimately extinguishing the flame.

Class B fires, which involve flammable liquids like gasoline, oils, or solvents, can spread rapidly if water is used, as it can cause the liquid to splash and spread the fire. Class C fires involve energized electrical equipment, and using water poses the risk of electrical shock, as water conducts electricity. Class D fires involve combustible metals that can react violently with water, making it hazardous to use water in those situations.

Thus, the use of water is both safe and effective for Class A fires, making it the appropriate choice.