Multiple choice

Which is the gas best suitable for extinguishing the fire involving electrical equipments and inflammable materials like petrol?

  1. (O2) oxygen

  2. Nitrogen

  3. Carbon dioxide

  4. Hydrogen
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Carbon dioxide is the best extinguishing agent for electrical fires and flammable liquid fires like petrol because: (1) It is non-conductive, so it won't cause electric shocks, (2) It is heavier than air and forms a blanket over the fire, cutting off oxygen supply, and (3) It doesn't leave residue or damage electronic equipment. Oxygen would fuel the fire, nitrogen is less effective, and hydrogen is highly flammable.

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