正确答案: D

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题目：Main bearings are required to support the crankshaft at each （）.

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[单选题]中间轴承挡油片对油环有（）作用。Ⅰ.径向止动；Ⅱ.轴向定位

Ⅰ+Ⅱ

[单选题]Factor influencing the position of the interface between the liquid seal and the oil in a purifier is （）.

None of the above is wrong

[单选题]Control of the main propulsion diesel engines can be shifted from the engine room to the wheelhouse from the （）.

engine room control station

[单选题]What condition will result in the automatic shutdown of a diesel engine? （）

Low lube oil pressure