单项选择题
A.danger to crew and cargo B.necessity of periodic inspection C.possible need to jettison D.All of the above
It is generally NOT allowed to clean up an oil spill by...
单项选择题It is generally NOT allowed to clean up an oil spill by using（）.
A.a boom B.suction equipment C.chemical agents D.skimmers
If your asphalt barge has operated more than 12 months ...
单项选择题If your asphalt barge has operated more than 12 months in saltwater in the 24 month period since it was last dry-docked，when is it required to be hauled out again? （）
A.12 months since last dry-docking B.18 months since last dry-docking C.24 months since last dry-docking D.36 months since last dry-docking
If the meter needle of the oxygen indicator cannot be s...
单项选择题If the meter needle of the oxygen indicator cannot be set to zero，what should be done? （）
A.Replace the batteries B.Check the sampling tube for blockage C.Adjust the final reading by the amount the needle is displaced from zero D.Replace the platinum filament
