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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单项选择题

A.base of the equipment
B.top of the equipment
C.power source
D.source of the fire

单项选择题

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

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