单项选择题

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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单项选择题

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

单项选择题

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

单项选择题

The pistons are cooled by oil supplied from the forced （） system.

A.fresh water
B.sea water
C.lubrication
D.fuel oil