柴油机某缸连杆已装的状态下，盘车一周可测得曲轴（）个臂距值。

【名词&注释】

柴油机(diesel engine)、玻璃钢(frp)、橡胶套(rubber tubing product)

[单选题]柴油机某缸连杆已装的状态下，盘车一周可测得曲轴（）个臂距值。

A. 3
B. 4
C. 5
D. 6

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学习资料：

[单选题]对于质量分布不在同一平面内，轴向长度较大的回转件，其平衡程度用（）表示。

A. A．FR
B. B．e
C. C．e•ω
D. D．G

[单选题]水润滑式艉轴工作轴颈包覆（），非工作轴颈包覆（）。

A. 铜套/塑料
B. 橡胶套/塑料
C. 玻璃钢套/橡胶
D. 铜套/玻璃钢

[单选题]铁梨木舵承发生（）时应更换。

A. 过度磨损
B. 变形
C. 开裂
D. 裂纹

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

A. suction
B. compression
C. expansion
D. exhaust

[单选题]On most modern diesel engines, the main and connecting rod bearings receive their lubricating oil by （）.

A. banjo feed
B. splash feed
C. gravity feed
D. pressure feed

[单选题]The concentration of total dissolved solids in the water of an auxiliary boiler can increase as a result of （）.

A. seawater contamination
B. frequent surface blows
C. dissolved oxygen deaeration
D. frequent bottom blow

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