单项选择题
Halon extinguishes a fire by（）.
A.breaking the chain reaction
B.smothering the fire
C.cooling the fire
D.coating the fuel with a nonflammable surface
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相关考题
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单项选择题
Halon extinguishers used on a class C fire should be directed at the（）.
A.base of the equipment
B.top of the equipment
C.power source
D.source of the fire -
单项选择题
Good housekeeping on a vessel prevents fires by（）.
A.allowing better access in an emergency
B.eliminating potential fuel sources
C.eliminating trip hazards
D.improving personnel qualifications -
单项选择题
Generally，the first action in extinguishing an LFG fire caused by escaping gas is to（）.
A.sweep flames away with water spray
B.shut off the leak
C.use a chemical foam fire extinguisher
D.call the local fire department
