Question

Fire extinguishers containing $C{O}_2$ are the best extinguishers for fires involving electrical equipment:

• A. because $C{O}_2$ being heavier than oxygen covers the fire like a blanket.
• B. because $C{O}_2$ being heavier than oxygen increases fire.
• C. because $C{O}_2$ being lighter than oxygen covers the fire like a blanket.
• D. None of these

Answer 1

Answer: (A)

because $C{O}_2$ being heavier than oxygen covers the fire like a blanket.

For fires involving electrical equipment and inflammable material like petrol, carbon dioxide is the best extinguisher. Carbon dioxide being heavier than oxygen covers the fire like a blanket. Since the contact between the fuel/inflammable material and oxygen is cut off, the fire is extinguished.