正确答案: C
When forced lubrication is used for propulsion engines , one independently drivenstandby pumps is to be provided in addition to the necessary pumps for normaloperation.
题目:Which of the following statements concerning the lubrication of diesel propulsionengines used in vessels over 300 gross tons is most accurate? ( )
解析:解析:gross:总的,毛的;accurate:精确的;additional:附加的;independent:独立;arrangement:布置,安排;reliable:可靠的;device:设备;actuate:开动;similar:类似的;sensor:传感器
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[单选题]听到警报信号后,船员必须在多长时间内到达指定的集合地点?
2分钟
[单选题]根据刮油环的作用,刮油环的结构和安装有以下特点________。I.环与缸壁接触面积小II.环自身弹性大III.环天地间隙小IV.环工作表面多为矩形V.双刀环之间有泄油孔VI.安装时刮刀尖端向下
I+II+III+V+VI
[单选题]决定两机动船是否构成对遇局面的航向是________。
船首向