单项选择题
A.CO2 B.dry chemical C.water D.foam
The outlet at a fire hydrant may be positioned anywhere...
单项选择题The outlet at a fire hydrant may be positioned anywhere from horizontal to pointing（）.
A.45°upward B.vertically upward C.vertically downward D.all of the above
The muster list shows each rig hand’s muster station，hi...
单项选择题The muster list shows each rig hand’s muster station，his duties during abandonment，basic instructions，and（）.
A.all emergency signals B.instructions for lowering the survival craft C.the time each weekly drill will be held D.work schedule
Small oil spills on deck can be kept from going overboa...
单项选择题Small oil spills on deck can be kept from going overboard by（）.
A.driving wooden plugs into the vents B.closing the lids on the vents C.plugging the scuppers D.plugging the sounding pipes
