220-1002 · Question #56
An electrical fire starts in a PC on a crowded sales floor of an office building. Which of the following is the BEST way to extinguish the fire and keep all personnel safe?
The correct answer is B. Use a "C" labeled fire extinguisher. Electrical fires are classified as Class C fires. A Class C fire extinguisher (often CO2 or dry chemical rated for Class C) is non-conductive and safe to use on energized electrical equipment. Using water (A) is extremely dangerous on electrical fires because water conducts…
Question
An electrical fire starts in a PC on a crowded sales floor of an office building. Which of the following is the BEST way to extinguish the fire and keep all personnel safe?
Options
- AUse a large container filled with water
- BUse a "C" labeled fire extinguisher
- CUse an "A" labeled fire extinguisher
- DUse a "B" labeled fire extinguisher
- EUse a halon fire suppression system
How the community answered
(21 responses)- B95% (20)
- E5% (1)
Explanation
Electrical fires are classified as Class C fires. A Class C fire extinguisher (often CO2 or dry chemical rated for Class C) is non-conductive and safe to use on energized electrical equipment. Using water (A) is extremely dangerous on electrical fires because water conducts electricity and can cause electrocution. Class A extinguishers are designed for ordinary combustibles (wood, paper, cloth). Class B extinguishers target flammable liquids. Halon is effective but is banned or restricted due to its ozone-depleting properties and poses health risks in enclosed spaces.
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