In an engine with a pot-shaped piston, some lubricating oil

【名词&注释】

可达性(accessibility)、综合性(comprehensive)、往复式(reciprocating)、完整性(integrity)、极限值、活塞环(piston ring)、说明书(specification)、蒸汽动力装置(steam power plant)、蒸汽机(steam engine)

[单选题]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 pi

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学习资料：

[单选题]最早用于海船上的蒸汽动力装置^{(steam power plant)}是（）。

A. 汽轮机
B. 往复式蒸汽机^{(steam engine)}
C. 往复式与透平联合装置
D. A+C

[单选题]（）是与产品的可靠性和维修性有关的综合性指标。

A. 完整性
B. 效率性
C. 有效性
D. 可达性

[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（）。

A. 该处总间隙的30%
B. 该处总间隙的20%
C. 说明书^{(specification)}规定极限值的30%
D. 说明书^{(specification)}规定极限值的20%

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

A. resisting oxidization
B. reducing friction
C. promoting moving speed
D. developing inertia

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

A. steering gear
B. turning gear
C. steering wheel
D. turning cycle

[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

A. (1) only is correct
B. (2) only is correct
C. both (1) and (2) are correct
D. neither (1) or (2) axe correct

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