Portable foam type fire extinguishers

1、Which portable fire extinguisher shoul

Which portable fire extinguisher should be used on a class C fire on board a vessel?（）ACarbon dioxideBWater (stored pressure)CFoamDCarbon tetrachloride

2、How does foam extinguish an oil fire?（

How does foam extinguish an oil fire?（）ABy cooling the oil below the ignition temperatureBBy removing the fuel source from the fireCBy excluding the oxygen from the fireDBy increasing the weight of the oil

3、Foam-type portable fire extinguishers

Foam-type portable fire extinguishers are most useful in combating fires involving（）.Asolid materials such as wood or bales of fiberBflammable liquidsCelectrical equipmentDmetallic solid

4、Foam extinguishes a fire by（）.

Foam extinguishes a fire by（）.Asmothering the burning materialBchemical combination with burning materialCabsorbing the burning materialDorganic destruction of the burning material

5、A portable foam (stored-pressure type)

A portable foam (stored-pressure type) fire extinguisher would be most useful in combating a fire in（）.AgeneratorsBoil drumsCthe bridge controlsDcombustible metal

6、Foam-type portable fire extinguishers

Foam-type portable fire extinguishers are more usefull in combating fires involving（）.Asolid materials such as wood or bales of fiberBinflammable liquidsCelectrical equipmentDmetallic solid