單項(xiàng)選擇題A foam-type portable fire extinguisher would be most useful in combating a fire in().

A.solid materials such as wood or bales of fiber
B.flammable liquids
C.a piece of electrical equipment
D.combustible metallic solids


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1.單項(xiàng)選擇題A foam-type portable fire extinguisher is most useful in fighting a fire in().

A.generators
B.oil drums
C.the bridge controls
D.combustible metals

2.單項(xiàng)選擇題A fixed CO2 system on a ship with a capacity of over 300 lbs (136 kilograms) CO2 which protects spaces other than tanks must have().

A.two or more releasing stations
B.automatic release in event of a fire
C.an audible alarm and time delay
D.an audible and visible alarm

3.單項(xiàng)選擇題A fire starts on your vessel while refueling. You should FIRST().

A.stop the ventilation
B.sound the general alarm
C.determine the source of the fire
D.attempt to extinguish the fire

4.單項(xiàng)選擇題A combination or all-purpose nozzle produces().

A.low-velocity fog only
B.a solid stream only
C.a solid stream and foam
D.a solid stream and fog

5.單項(xiàng)選擇題A CO2 portable extinguisher is annually checked by().

A.reading the gage pressure
B.weighing the extinguisher
C.discharging a small amount of CO2
D.seeing if the seal has been broken