A yellow star marking on an extinguisher indicates suitability for Class D fires.

A yellow star marking on an extinguisher indicates suitability for Class D fires.

• A. Blue circle
• B. Red square
• C. Green triangle
• D. Yellow star

Answer: (D)

A yellow star on an extinguisher label identifies it as suitable for Class D fires, which involve combustible metals like magnesium or titanium. This marking signals that the extinguisher uses a specialized dry-powder agent designed to smother metal fires, not water or ordinary foams, which can be dangerous with metal metals. Recognizing this symbol helps you choose the right tool quickly in an emergency. For context, other common markers show different classes: a blue circle indicates electrical fires (Class C), a red square marks flammable liquids (Class B), and a green triangle stands for ordinary combustibles (Class A).

A yellow star on an extinguisher label identifies it as suitable for Class D fires, which involve combustible metals like magnesium or titanium. This marking signals that the extinguisher uses a specialized dry-powder agent designed to smother metal fires, not water or ordinary foams, which can be dangerous with metal metals. Recognizing this symbol helps you choose the right tool quickly in an emergency.

For context, other common markers show different classes: a blue circle indicates electrical fires (Class C), a red square marks flammable liquids (Class B), and a green triangle stands for ordinary combustibles (Class A).