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單項(xiàng)選擇題

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 （）.

A.crosshead
B.crankpin
C.crank journal
D.gudgeon pin

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單項(xiàng)選擇題

In addition to lubricating, cylinder oil assists in forming a gas seal and contains （） which clean the cylinder liner.

A.additives
B.water
C.grease
D.acid solution

單項(xiàng)選擇題

In a typical fuel system, the oil is stored in （） in the double bottom.

A.setting tanks
B.service tanks
C.tanks
D.drain tanks

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