A、Fires in electrical equipment
B、Flammable oils and greases
C、Class A fires in ordinary combustibles
D、Materials containing their own oxygen
更多“Halon fire extinguishers are NOT effective when used on which types of fires?（）”相关的问题
A、The agent is considered nontoxic at room temperature in low concentrations B、The agent is less effective than carbon dioxide C、Halon primarily extinguishes the fire by cooling D、The agent cannot be used on electrical fires because it leaves a residue
A、breaking the chain reaction B、smothering the fire C、cooling the fire D、coating the fuel with a nonflammable surface
A、breaking the chain reaction B、smothering the fire C、cooling the fire D、coating the fule with a nonflammable surface
A、Fires in electrical equipment B、Flammable oils and greases C、Class "A" fires in ordinary combustibles D、Materials containing their own oxygen
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
A、Conducts electricity B、Difficult to store C、Large volume necessary to be effective D、Ineffective in powdered metal fires
A、A.base of the equipment B、B.top of the equipment C、C.power source D、D.source of the fire
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