Alcohol foam
Dry chemical
Chemical foam
Water fog
单选题A class B fire is most successfully fought by（）.A preventing oxygen from reaching the burning materialB cooling the burning material below its ignition temperatureC using the extinguishing agent to make the burning material fire-resistantD using the extinguishing agent to absorb the heat
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单选题For which of the listed classes of fire combinations would carbon dioxide be most suitable as the extinguishing agent （）.A Class A and class BB Class B and class CC Class A and class CD Class C, class D, and class E
单选题（）as the chemical extinguisher agent, should be used for a an electric fire.A Dry chemical or foamB Foam or soda acidC carbon dioxide or foamD carbon dioxide or dry chemical
单选题Which extinguishing agent is best for use on a magnesium fire?（）A WaterB SandC CO2D Dry chemical
单选题Which extinguishing agent is the best for use on electrical fires?（）A FoamB CO2C Dry chemicalD Water fog
单选题Which fire extinguishing agent can NOT be used on an ethylenediamine?（）A Water foamB Dry chemical powderC Water fogD Alcohol foam
单选题As an extinguishing agent，foam（）.A conducts electricityB should be directed at the base of the fireC is most effective on burning gases which are flowingD extinguishes by cooling oil fires below ignition temperature
