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单选题
Which of the following is a class A fire?下列哪一项是A类火灾（）
A
Halon 卤化烃(二氟二氯甲烷)
B
electrical 电气类
C
liquid 液体类
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考题
Which of the following is a class A fire?下列哪一项是A类火灾（）A、Halon 卤化烃(二氟二氯甲烷)B、electrical 电气类C、liquid 液体类
考题
Under what conditions would the use of a Class C fire extinguisher be preferable to a Class A extinguisher? C类火灾灭火器比A类灭火器更适用于以下哪一种情况？（）A、A .When the fire involves paper products当火灾和纸制品有关时B、B .When the fire is caused by flammable products当火灾由易燃物造成C、C .When the fire involves electrical equipment当火灾和电器设备有关时D、D .When the fire is in an enclosed area当火灾发生在一个封闭空间内
考题
CO2 and Halon extinguishers are used for electrical fire, as well as （）fire.A、commonB、oilC、electricalD、chemical
考题
单选题Which of the following statements is true concerning Halon 1301 fire extinguishing equipment?（）A
The agent is considered nontoxic at room temperature in low concentrationsB
The agent is less effective than carbon dioxideC
Halon primarily extinguishes the fire by coolingD
The agent cannot be used on electrical fires because it leaves a residue
考题
单选题Halon fire extinguishers are NOT effective when used on which types of fires?（）A
Fires in electrical equipmentB
Flammable oils and greasesC
Class A fires in ordinary combustiblesD
Materials containing their own oxygen
考题
单选题CO2 and Halon extinguishers are used for electrical fire, as well as （）fire.A
commonB
oilC
electricalD
chemical
考题
单选题高倍泡沫灭火剂主要由发泡剂、泡沫稳定剂、溶剂、抗冻剂以及水等组分组成。用于扑救（）。A
A类火灾和B类火灾中极性液体火灾B
B类火灾中非极性液体火灾和C类火灾C
B类火灾中极性液体火灾和C类火灾D
A类火灾和B类火灾中非极性液体火灾
考题
单选题Under what conditions would the use of a Class C fire extinguisher be preferable to a Class A extinguisher? C类火灾灭火器比A类灭火器更适用于以下哪一种情况？（）A
A .When the fire involves paper products当火灾和纸制品有关时B
B .When the fire is caused by flammable products当火灾由易燃物造成C
C .When the fire involves electrical equipment当火灾和电器设备有关时D
D .When the fire is in an enclosed area当火灾发生在一个封闭空间内
考题
单选题Halon extinguishers used on a class C fire should be directed at the（）.A
base of the equipmentB
top of the equipmentC
power sourceD
source of the fire
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