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單項(xiàng)選擇題

Halon extinguishes a fire by（）.

A.breaking the chain reaction
B.smothering the fire
C.cooling the fire
D.coating the fule with a nonflammable surface

你可能感興趣的試題

單項(xiàng)選擇題

Halon extinguishes fire primarily by（）.

A.cooling
B.smothering
C.shielding of radiant heat
D.breaking the chain reaction

單項(xiàng)選擇題

Halon gas will decompose and may form very hazardous toxic fumes when discharged（）.

A.directly on flames
B.at room temperature
C.in an extremely cold climate
D.None of the above