水润滑艉轴承首端设置填料函式密封装置是为了（）。

【名词&注释】

螺旋桨(propeller)、准备工作(preparation work)、增压器(turbocharger)、国内外、效率高(high efficiency)、填料函式

[单选题]水润滑艉轴承首端设置填料函式密封装置是为了（）。

A. 防止艉轴承过分冷却
B. 防止海水流入机舱
C. 使艉轴承润滑均匀
D. 减少艉轴承磨损

查看答案&解析 查看所有试题

学习资料：

[单选题]航行中一旦发现增压器振动，则首先应该（）。

A. A．停机检修
B. B．查明原因
C. C．降低转速
D. D．锁住转子

[单选题]轴系同轴度误差应（）。

A. 小于允许值
B. 大于允许值
C. 交点在δmax-φmax三角形内
D. 交点在δmax-φmax三角形外

[单选题]螺旋桨与艉轴的油压套合无键连接方式是目前国内外最先进的安装工艺，具有（）等优点。

A. 可靠连接、拆装方便
B. 工艺简单、操作方便
C. 工时少、效率高^{(high efficiency)}
D. 工作可靠、费用低

[单选题]滑油系统的备车准备工作应检查（）。Ⅰ.循环油柜油位；Ⅱ.轴承油位；Ⅲ.储油柜油位；Ⅳ.分油机

A. Ⅰ+Ⅱ
B. Ⅰ+Ⅲ
C. Ⅰ+Ⅳ
D. Ⅰ+Ⅱ+Ⅲ

[单选题]Low compression of diesel engine may result from （）

A. a worn cylinder
B. broken piston rings
C. any of A and B
D. none of the above

[单选题]The diffuser prevents pressure pulses from one cylinder （） another during operation.

A. to interfere with
B. interfering with
C. to help scavenging
D. helping scavenging

[单选题]VIT means （）

A. variable injection timing
B. variable inlet tonnage
C. vertical incoming tonnage
D. vertical inlet tank

[单选题]Fuel oil transfer systems used onboard diesel propelled vessels are required to have （）.

A. two fuel oil transfer pumps provided where one is to be independent of the main engine
B. two fuel oil transfer pumps, with a combined capacity exceeding the maximum consumption of the main engine
C. engine driven transfer pumps and only used in constant speed applications
D. the capacity of the engine driven pump exceed the consumption rate of the engine to which it is attached

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