正确答案: B

仅Ⅱ对

题目：中间轴承有（）。Ⅰ.上瓦和下瓦D.仅有下瓦；Ⅲ.上下瓦可以互换

查看原题 查看所有试题

学习资料的答案和解析：

[单选题]体现主机紧急倒车性能的指标是（）。

A或B

[单选题]水润滑式艉轴的（）包覆铜套，以防止腐蚀。

工作轴颈

[单选题]静平衡试验后，较轻桨叶上的挂重大于允许值，则应铲去（）附近金属。

较重桨叶叶背边缘

[单选题]增压二冲程柴油机当增压器损坏无法使用而使用辅助或应急鼓风机时，其运转功率与转速的降低程度主要应考虑的因素是（）。Ⅰ.排气温度；Ⅱ.柴油机振动；Ⅲ.排气颜色；Ⅳ.柴油机运转状态

Ⅰ＋Ⅲ＋Ⅳ

[单选题]In a complete oil/water separator, more oil will separate out onto the underside of these plates and travel outwards until it is free to rise into the oil collecting space Whats the meaning of "it" in the sentence above?（）

oil

[单选题]The lubricating system for the cylinder walls is different from the bearings in that the oil for former one is supplied in （） while that for latter one is （）.

measured quantity；sufficient

[单选题]There is an injection pump for each cylinder, which is usually operated once every cycle by （） on the camshaft.

a cam