單項(xiàng)選擇題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


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1.單項(xiàng)選擇題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

2.單項(xiàng)選擇題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

3.單項(xiàng)選擇題The atmosphere in a tank is too lean if it is（）.

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

4.單項(xiàng)選擇題The all-purpose nozzle will produce a fog spray when you（）.

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

5.單項(xiàng)選擇題Small quantities of flammable liquids needed at a work site should be（）.

A.used only under the supervision and direction of a ship's officer
B.tightly capped and stowed with other tools near the job site when securing at the end of the day
C.used only when a pressurized fire hose is laid out ready for immediate use
D.in a metal container with a tight cap