A fuel line breaks，sprays fuel on the hot exhaust manifold，and catches fire. Your FIRST action should be to（）.

单项选择题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

单项选择题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

单项选择题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

单项选择题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

单项选择题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