正确答案: C

drilled passage

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

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学习资料的答案和解析：

[单选题]柴油机运转中，根据（）现象可迅速判断柴油机燃烧室零件是否产生穿透性裂纹。Ⅰ.冷却水压力表指针波动；Ⅱ.冲车时有水珠喷出；Ⅲ.缸壁面有锈痕；Ⅳ.膨胀水柜水位变化；Ⅴ.曲轴箱油位升高。

Ⅰ＋Ⅳ＋Ⅴ

[单选题]增压器发生故障后采用拆除转子的措施，不仅防止事故扩大，更重要的是保护了转子，但缺点是（）。

工作量大

[单选题]曲折反映了两相邻轴轴心线呈（）的状态。

相交且法兰中心对准

[单选题]The four strokes are called suction, compression, expansion and exhaust, but only （） stroke provides the power to drive the ship.

expansion

[单选题]When the follower is on the base circle of the cam, the pump plunger is at the （） of its stroke.

bottom

[单选题]Turbulence in a diesel engine cylinder is of major importance in providing （）.

complete fuel/air mixing