A.consealed
B.detained
C.contained
D.kept
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A.kept in nonmetal containers
B.discarded as soon as possible
C.cleaned thoroughly for reuse
D.kept in the paint locker
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Halon extinguishers used on a class C fire should be directed at the（）.
Control valves of a CO2 system may be located within the protected space when（）.
Foam extinguishes a fire mainly by（）.
Fire may be spread by which means?（）.
Fire extinguishing agents used on Class C fires must be（）.
How do you operate a portable CO2 fire extinguisher?（）.
How is the external flotation bladder of an immersion suit inflated?（）
Halon fire extinguishers are NOT effective when used on which types of fires?（）
Foam extinguishes a fire by（）.
Generally，the first action in extinguishing an LFG fire caused by escaping gas is to（）.