正确答案: D

gudgeon pi

题目：In an engine with a pot-shaped piston, some lubricating oil from the main bearing will pass along a drilled passage in the crankshaft to the bottom end bearing and then up a connection rod to the （）.

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学习资料的答案和解析：

[单选题]最早用于海船上的蒸汽动力装置是（）。

往复式蒸汽机

[单选题]（）是与产品的可靠性和维修性有关的综合性指标。

有效性

[单选题]当十字头式柴油机缸径＞700mm时，在未装活塞环的条件下，活塞位于近上、下止点位置时，活塞裙部减磨环处与气缸内孔单边最小间隙应不小于（）。

该处总间隙的20%

[单选题]A lubricant often has to perform many duties in any situation, in addition to its fundamental job of （）.

reducing friction

[单选题]Be sure to make the engine turn by （） before starting and after stopping .

turning gear

[单选题]In a diesel engine, excessive cylinder liner wear will cause （）(1) increased blow-by(2) wear between the piston ring and groove

both (1) and (2) are correct