单项选择题
A fishing vessel that is required to have a fireman’s outfit，must have all of the following in the outfit except a（）.
A.flashlight
B.combustible gas indicator
C.self-contained breathing apparatus
D.fire axe
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A fire starting by spontaneous combustion can be expected in which condition?（）
A.Paints，varnish，or other liquid flammables are stowed in a dry stores locker
B.Inert cargoes such as pig iron are loaded in a wet condition
C.Oily rags are stowed in a metal pail
D.Clean mattresses are stored in contact with an electric light bulb -
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A.has left hand twist
B.has inside threads on both ends
C.has outside threads on both ends
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What is LEAST likely to cause ignition of fuel vapors?（）.
A.Static electricity
B.An open running electric motor
C.Loose wiring
D.Explosion proof lights
