正确答案: A
朝上/上行时布油,下行时刮油
题目:四冲程柴油机活塞最下面一道环都是刮油环,其外边缘如一边是斜面,则安装时斜面应该______以便活塞______。
解析:A
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举一反三的答案和解析:
[单选题]液压油中空气过多造成的危害不包括( )。
使液压油乳化
[单选题]我国生产的静水压力释放器是哪种形式?
拉杆式
[单选题]救生筏的最大乘员定额为:
25人
[单选题]为便利装卸,同一卸港的集装箱数量少时,应( )。
集中配装
[单选题]As soon as the ship gets alongside the___(码头),you should lower the gangway and put a safety net below it.
wharf
[单选题]下列何种情况下,直航船的行动是不正当的
为校对罗经而作航向的改变
[单选题]难船为直升机显示吊运区位置的标注是:
白色H
[单选题]While inspecting the steering system at sea, you should check for
any leaks in the system
[单选题]________ were brought back to ship from the sea
The crew