A、Carbon dioxide
B、Water (stored pressure)
C、Dry chemical
D、Foam
更多“On a class B fire，which portable fire extinguisher would be the LEAST desirable?（）”相关的问题
A、A.outside B、B.on class C fires C、C.in an emergency D、D.on class B fires
A、CO
A、size of the fire when initially observed B、complete containment of the fire C、cooling ability of the firefighting agent D、class of the fire
A、class "A" fires B、class "B" fires C、class "C" fires D、class "D" fires
A、Carbon dioxide B、Water (stored pressure) C、Foam D、Carbon tetrachloride
A、A.class "A" fire B、B.class "B" fire C、C.class "C" fire D、D.class "D" fire
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
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
A、Fires in electrical equipment B、Flammable oils and greases C、Class A fires in ordinary combustibles D、Materials containing their own oxygen
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