第5题
This fire extinguisher is to be used only in case of().
A.urgency
B. crisis
C. immediacy
D.emergency
第7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'
第8题
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
A、Foam fire extinguishers
B、CO₂ fire extinguishers
C、NO₂ fire extinguishers
D、Liquid fire extinguishers
第10题
第11题
The longer an oil fire is permitted to burn, the _____.
A.harder it is to extinguish
B.easier it is to extinguish
C.less chance there is of re-ignition
D.easier it is to control
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