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单选题
The straight stream capability of an all-purpose nozzle is used in fighting a class A fire to（）.
A
shield fire fighters from radiant heat
B
break up burning material
C
get the most water possible on the fire
D
drive heat and smoke ahead of the fire fighters
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单选题If a firefighting situation calls for low-velocity fog you would（）.A
order the engine room to reduce pressure on the fire pumpB
put the lever on an all-purpose fire nozzle all the way forwardC
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the nozzle will overheat and crackC
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单选题On the all-purpose nozzle，the position of the valve when the handle is all the way forward is（）.A
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单选题Which firefighting method is an example of an indirect attack on a fire?（）.A
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单选题A combination or all-purpose nozzle produces（）.A
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考题
单选题When using a high-velocity fog stream in a passageway，the possibility of a blow back must be guarded against. Blow back is most likely to occur when（）.A
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考题
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单选题The 12-foot low-velocity fog applicator（）.A
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