正确答案: C

the bowl periphery

题目：In a purifier, the interface between the liquid seal and the oil should be positioned as close as possible to （）.

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学习资料的答案和解析：

[单选题]底脚螺栓的作用是将（）牢牢地固定在一起。Ⅰ.柴油机机座；Ⅱ.船体双层底底座；Ⅲ.固定垫块；Ⅳ.活动垫块。

Ⅰ＋Ⅱ＋Ⅲ＋Ⅳ

[单选题]压气机叶片损伤是由于（）造成的。Ⅰ.轴承严重磨损；Ⅱ.吸入硬质颗粒；Ⅲ.气流冲击；Ⅳ.振动；Ⅴ.碰撞。

Ⅰ＋Ⅱ＋Ⅴ

[单选题]总偏移是（）。

A或B

[单选题]按舵的旋转轴线的位置不同将舵系分为（）种。

B．3

[单选题]（） is not properly set thus causing either advanced or retarded firing.

A fuel injection pump

[单选题]During the fuel injection period, fuel pressure must exceed cylinder gas pressure to （）.

ensure penetration and distribution of the fuel in the combustion chamber

[单选题]To minimize corrosion, fuel oil strainer disks, spacers and scraper blades are made of （）.

monel metal or stainless steel

[单选题]One major disadvantage of a low-speed diesel as compared to a steam main-propulsion system is（）.

a minimum speed for the engines that limits the minimum speed of the vessel