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全部科目 > 水路交通运输技能考试 > 海船船员考试 > 船舶管理(轮机专业) > 轮机英语 > 船舶电气与船舶安全

单项选择题

A segregated ballast system is a system where ()

    A.all ballast is processed through the oily water separator
    B.ballast is taken on and discharged through a separate main deck riser
    C.ballast and cargo tanks are separated by cofferdams
    D.all ballast lines, tanks, and pumps are independent of those used for oil

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