单项选择题
A.the accumulation of explosive gases B.faster cooling of the fire C.the fire to spread through the ventilation system D.fixed foam systems to be ineffective
The bilge pump on a fishing vessel（）.A.must be fixed if...
单项选择题The bilge pump on a fishing vessel（）.
A.must be fixed if the vessel exceeds 12 meters in length B.may be used as a fire pump C.must be portable if there are more than 4 watertight compartments D.must be capable of pumping at least 450 gpm
The best method of extinguishing a class A fire is to（）...
单项选择题The best method of extinguishing a class A fire is to（）.
A.remove oxygen from the area B.cool fuel below ignition temperature C.smother with CO2 D.smother fire with foam
The BEST method of applying foam to a fire is to（）.A.sp...
单项选择题The BEST method of applying foam to a fire is to（）.
A.spray directly on the base of the fire B.flow the foam down a nearby vertical surface C.sweep the fire with the foam D.spray directly on the surface of the fire
