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
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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
A.remove oxygen from the area
B.cool fuel below ignition temperature
C.smother with CO2
D.smother fire with foam
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
A.incapable of supporting combustion because the hydrocarbon content is below the LFL (Lower Flammable Limit)
B.capable of supporting combustion because the hydrocarbon content is above the UFL (Upper Flammable Limit)
C.capable of supporting a fire once started
D.not safe for ballasting
A.pull the nozzle handle all the way back toward the operator
B.pull the nozzle handle back to a position where the handle is perpendicular to the plane of the nozzle
C.push the nozzle handle forward as far as it will go
D.insert a fog applicator between the fire hose and nozzle
最新試題
The best method of extinguishing a class A fire is to（）.
The discharge from a carbon dioxide fire extinguisher should be directed（）.
One disadvantage of using regular dry chemical (sodium bicarbonate) in firefighting is that（）.
Recharging a previously used cartridge-operated dry-chemical extinguisher is accomplished by（）.
Portable CO2 fire extinguishers should NOT be used to inert a space containing flammable liquids due to the danger of（）.
The BEST method of applying foam to a fire is to（）.
On a ship，when may a work vest be substituted for a required life preserver?（）
The blocking or absence of fire dampers can cause（）.
Prior to getting underway，the Master or person in charge of a ship must（）.
Portable fire extinguishers must be provided for the cargo tank area of an unmanned tank barge（）.