单项选择题
The class of fire on which a blanketing effect is essential to extinguish the fire is （）.
A.class A
B.class B
C.class C
D.class D
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相关考题
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单项选择题
Which of the listed classes of fire is considered as one involving electrical equipment?（）
A.Class "A"
B.Class "B"
C.Class "C"
D.Class "D" -
单项选择题
Besides heat, fuel, and oxygen, which of the following is necessary for a fire to exist?（）
A.Chain reaction
B.Thermal action
C.Chemical occlusion
D.Pyrotechnical reaction -
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A fire and boat drill on a tank vessel shall, by regulation, include （）.
A.starting the fire pumps
B.checking firemans outfits and other personnel rescue equipment
C.checking relevant communications equipment
D.All of the above
