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[判断题]
This fire extinguisher is to be used only in case of immediacy.()
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第4题
This fire extinguisher is to be used only in case of().
A.urgency
B. crisis
C. immediacy
D.emergency
第6题
The class of fire on which a blanketing effect is essential to extinguish the fire isA.Cla
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'
第8题
The four basic components of a fire are fuel, heat, oxygen and a chain reactionWhich of th
e following statements best describes what must be eliminated to extinguish a fire？
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A.Any one component can be eliminated to extinguish a fire
B.Any two components must be eliminated to properly extinguish a fire
C.Any three components must be eliminated to properly extinguish a fire
D.Ali four components must be eliminated to extinguish any fire
第9题
When using the fire extinguisher to extinguish the fire, the nozzle of the fire extinguisher shall be aligned with the middle of the flame（）
第10题
How does foam extinguish an oil fire ？______.A.By cooling the oil below the ignition tempe
How does foam extinguish an oil fire ？______.
A.By cooling the oil below the ignition temperature
B.By removing the fuel souce from the fire
C.By excluding the oxygen from the fire
D.By increasing the weight of the oil
第11题
Except in rare cases, it is impossible to extinguish a shipboard fire by ______.A.removing
Except in rare cases, it is impossible to extinguish a shipboard fire by ______.
A.removing the heat
B.removing the oxygen
C.removing the fuel
D.interrupting the chain reaction
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