Large scale fire on fuel gas line is normally extinguished by________________?
Correct answer: D. Nitrogen
- A. Water
- B. Steam
- C. Foam
- D. Nitrogen
Explanation
Nitrogen extinguishes a large fuel-gas-line fire by diluting and inerting the gas-air mixture, while also reducing the oxygen concentration. Water is mainly used for cooling, and foam is more suitable for liquid-fuel fires.
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