单项选择题

Foam extinguishes a fire by（）.

A.shutting off the air supply
B.cooling the fuel to below ignition temperature
C.dispersing the fuel
D.removing the source of ignition

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单项选择题

Flames from small leaks of LFG may be extinguished by（）.

A.utilizing carbon dioxide or dry chemical fire extinguishers
B.utilizing soda and acid fire extinguishers
C.blowing the flames out
D.letting it burn itself out

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

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