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單項選擇題

The piston moves up and down, thus causing the rotational movement of the（）

A.crankshaft
B.connecting rod
C.cross-head
D.main beating

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單項選擇題

The piston cooling system may employ similar components, except that a drain tank is used instead of a head tank That means this system （）.

A.doesnt use a drain tank but a head tank
B.uses a drain tank not head tank
C.uses a drain tank and a head tank
D.uses neither a drain tank nor a head tank

單項選擇題

The piston cooling system may employ similar components, except that （） is used instead of a head tank.

A.a sump tank
B.a feed well
C.a double bottom tank
D.a drain tank