单项选择题
A.cooling B.smothering C.shielding of radiant heat D.breaking the chain reaction
Halon extinguishes a fire by（）.A.breaking the chain rea...
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
Halon extinguishers used on a class C fire should be di...
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
Good housekeeping on a vessel prevents fires by（）.A.all...
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
