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名词解释题
泡沫细胞（foam cell）
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单选题A portable foam fire extinguisher is placed in operation by（）A
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pressing the foam leverC
squeezing the grip handleD
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单选题Production of mechanical foam by a portable in-line foam proportioner（）.A
increases the size of foam bubbles formedB
increases the rate of foam productionC
improves the extinguishing properties of foamD
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单选题Which of the following statements regarding low expansion foam and its application is INCORRECT?（）.A
Foam should not be used on electrical firesB
One kilo of low expansion foam solution produces much more foamC
Foam is only efficient when it covers the top of burning combustiblesD
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单选题The usual method of effectively applying foam on a fire is by （）.A
spraying directly on the base of the fireB
flowing the foam down a vertical surfaceC
sweeping the fire before you with the foamD
spraying directly on the surface of the fire
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单选题The BEST method of applying foam to a fire is to（）.A
spray directly on the base of the fireB
flow the foam down a nearby vertical surfaceC
sweep the fire with the foamD
spray directly on the surface of the fire
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单选题0ne of the limitations of foam as an extinguishing agent is that foam（）.A
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is corrosive and to fire fightersD
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多选题下列哪些是变异型的R-S细胞（ ）A陷窝细胞B泡沫细胞C霍奇金细胞D镜影细胞E爆米花细胞(popcom cell)
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