A、A.fight an electrical fire
B、B.fight a magnesium fire
C、C.eliminate smoke from a compartment
D、D.All of the above
更多“Water fog from an all-purpose nozzle may be used to（）.”相关的问题
A、low-velocity fog B、high-velocity fog C、a straight stream of water D、foam spray
A、is a finer，more diffuse water spray than low-velocity fog B、requires that the water pressure be no greater than 60 psi C、produces an effective fog pattern no more than 6 feet beyond the nozzle D、extinguishes a fire by absorbing heat and reducing the supply of oxygen
A、completely drain the boiler in an emergency B、prevent sludge from forming in the drum C、remove floating impurities from the boiler water surface D、remove settled solids from the water drum
A、remove suspended and precipitated solids from the boiler water B、completely drain the boiler in an emergency situation C、prevent hardened scale deposits in the water drum D、remove floating impurities from the oily water surface
A、to cut down the amount of cooling water needed B、to prevent an excess amount of cooling water from being discharged to the bilges C、to supply hot water to the evaporator for more economical operation D、None of the above is tree
A、drain water from the air receiver B、drain water from the cylinders C、delay the compression process until the motor is up to speed D、check pump alignment
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