单项选择题
Flame screens are used to（）.
A.contain flammable fumes
B.protect firefighters from flames
C.prevent flames from entering tanks
D.keep flames and sparks from getting out of an engine's exhaust system
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相关考题
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单项选择题
Fixed CO2 systems would not be used on crew’s quarters or（）.
A.the paint locker
B.spaces open to the atmosphere
C.cargo holds
D.the engine room -
单项选择题
Firefighting foam is only effective when the foam（）.
A.penetrates to the bottom of the fire
B.is kept saturated with low-velocity water fog
C.mixes with the burning fuel oil
D.completely covers the top of the burning liquid -
单项选择题
Fire may be spread by which means?（）.
A.Conduction of heat to adjacent surfaces
B.Direct radiation
C.Convection
D.All of the above
