Which class of fire is caused by wood, cloth, plastics, and upholstery?

Which class of fire is caused by wood, cloth, plastics, and upholstery?

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

Answer: (A)

The correct classification for fires caused by wood, cloth, plastics, and upholstery is Class A. This class encompasses ordinary combustible materials that are typically found in everyday environments, such as paper, wood, cloth, rubber, and some plastics. Class A fires are characterized by the ability to leave ash after they burn, which is why this classification is appropriately named "Class A"—the letter often relates to the ash residue. Class B fires, on the other hand, involve flammable liquids and gases such as gasoline, oil, paint, and solvents. Class C fires pertain to live electrical equipment and require specific methods to extinguish without risking electric shock. Lastly, Class D fires are those that involve combustible metals like magnesium, titanium, and sodium, which behave differently than other categories of fire. Thus, understanding these classifications is critical for effective fire safety and response measures, as each type requires different extinguishing methods.

The correct classification for fires caused by wood, cloth, plastics, and upholstery is Class A. This class encompasses ordinary combustible materials that are typically found in everyday environments, such as paper, wood, cloth, rubber, and some plastics. Class A fires are characterized by the ability to leave ash after they burn, which is why this classification is appropriately named "Class A"—the letter often relates to the ash residue.

Class B fires, on the other hand, involve flammable liquids and gases such as gasoline, oil, paint, and solvents. Class C fires pertain to live electrical equipment and require specific methods to extinguish without risking electric shock. Lastly, Class D fires are those that involve combustible metals like magnesium, titanium, and sodium, which behave differently than other categories of fire. Thus, understanding these classifications is critical for effective fire safety and response measures, as each type requires different extinguishing methods.