在进行活塞运动部件校中时，必须测量（）。

【名词&注释】

润滑油(lubricating oil)、环境温度(ambient temperature)、柴油机(diesel engine)、螺旋桨桨叶(propeller blades)、气缸中心线

[单选题]在进行活塞运动部件校中时，必须测量（）。

A. 曲轴的臂距差
B. 滑块与导板的间隙
C. 连杆大小端轴承的径向间隙
D. 导板平面与气缸中心线的平行度

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学习资料：

[单选题]柴油机冷态即环境温度下测量曲轴臂距差具有测量值（）。Ⅰ.准确；Ⅱ.符合规范；Ⅲ.稳定；Ⅳ.便于操作；Ⅴ.不受温度影响。

A. Ⅰ＋Ⅲ＋Ⅳ
B. Ⅰ＋Ⅳ
C. Ⅱ＋Ⅳ
D. Ⅰ＋Ⅳ＋Ⅴ

[单选题]艉轴承密封装置油压试验是采用重力油柜润滑油，从泵油至回油连续（）min之内不准漏油。

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

[单选题]螺旋桨桨叶面上的B区是指（）的区域和A区两侧边缘、吸力面0.7R以内范围。

A. 0.3～0.5R
B. 0.4～0.7R
C. 0.5～0.8R
D. 0.6～0.9R

[单选题]The bearing shell generally has （） for location and oil grooves round the center of its axial length.

A. tips
B. tags
C. lips
D. key

[单选题]The temperature difference between the inlet and outlet temperature of the lube oil cooler in the lubricating system for the diesel engine is generally between （）.

A. 8-10℃
B. 10-12℃
C. 10-15℃
D. 10-20℃

[单选题]During the fuel injection period, fuel pressure must exceed cylinder gas pressure to （）.

A. ensure penetration and distribution of the fuel in the combustion chamber
B. ensure the needle valve is flushed clean during each injection
C. prevent combustion gas blowback into the open needle valve
D. prevent reflected pressure waves when the needle valve close

[单选题]Diesel engine control can be obtained by the bridge （）.

A. at any time
B. only after the engine room control station is switched to “bridge control”
C. whenever the secondary station is switched to "bridge control"
D. with the approval of the chief engineer only

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