单项选择题
Halon from extinguishers used on a class B fire，should be directed（）.
A.at the top of the flames
B.at the base of the fire near the edge
C.in short quick bursts
D.toward the upwind side of the fire
点击查看答案&解析
相关考题
-
单项选择题
Halon fire extinguishers are NOT effective when used on which types of fires?（）
A.Fires in electrical equipment
B.Flammable oils and greases
C.Class A fires in ordinary combustibles
D.Materials containing their own oxygen -
单项选择题
Halon extinguishes fire primarily by（）.
A.cooling
B.smothering
C.shielding of radiant heat
D.breaking the chain reaction -
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
