正确答案: B

内、外圈/活塞杆

题目：对于活塞杆下端是方形法兰的机型如B&W，如只需解体活塞杆填料函则不需吊出活塞，在曲轴箱内拆掉填料函的（）固定螺栓，用专用夹具夹住（），使整个填料函落在夹具的平板上，进行解体。

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学习资料的答案和解析：

[单选题]拆装螺母时，不符合安全操作规程的是（）。

一手抓住固定物

[单选题]Aluminum pistons have （） coefficient of thermal expansion compared with those of cast iron.

higher

[单选题]Among the rings of a piston the （） one is subjected to the greatest load and temperature.

top

[单选题]In a purifier, the interface between the liquid seal and the oil should be positioned as close as possible to （）.

the bowl periphery

[单选题]The pressure of pilot air is usually （） than that of starting air.

lower

[单选题]The selection of a lubricating oil depends to a great extent on the operating conditions,（）.

B and C

[单选题]Which of the following is a factor of fuel oil almost having nothing to do with the formation of combustion products?（）

setting point