单项选择题
All portable fire extinguishers must be capable of being（）.
A.carried by hand to a fire
B.carried or rolled to a fire
C.recharged in the field
D.used on class 'B' fires
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相关考题
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单项选择题
All of the following are part of the fire triangle EXCEPT（）.
A.electricity
B.fuel
C.oxygen
D.heat -
单项选择题
After extinguishing a paint locker fire using the fixed CO2 system，the next action is to have the space（）.
A.opened and burned material removed
B.left closed with vents off until all boundaries are cool
C.checked for oxygen content
D.doused with water to prevent reflash -
单项选择题
After extinguishing a fire with CO2，it is advisable to（）.
A.use all CO2 available to cool the surrounding area
B.stand by with water or other agents
C.thoroughly ventilate the space of CO2
D.jettison all burning materials
