Additives （） protective layers on metal surfaces guarding

【名词&注释】

准备工作(preparation work)、气缸套(cylinder liner)、轴系理论中心线、输送泵(transfer pump)、光学仪器法

[单选题]Additives （） protective layers on metal surfaces guarding them against corrosion.

A. damage
B. form
C. dissolve
D. contaminate

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学习资料：

[单选题]气缸套内圆表面采用（）加工，是防止拉缸事故的工艺措施之一。Ⅰ.珩磨；Ⅱ.振动；Ⅲ.机械；Ⅳ.波纹；Ⅴ.磨削。

A. Ⅰ＋Ⅱ＋Ⅳ
B. Ⅰ＋Ⅳ
C. Ⅱ＋Ⅳ
D. Ⅰ＋Ⅱ

[单选题]涡轮壳体局部腐蚀较重，可采用（）修理。

A. 有机粘接
B. 焊补
C. 局部更换
D. 更换壳体

[单选题]确定轴系理论中心线的方法有（）。Ⅰ.拉线法；Ⅱ.平轴法；Ⅲ.指针法；Ⅳ.直尺-塞尺法；Ⅴ.光学仪器法。

A. Ⅱ＋Ⅲ
B. Ⅰ＋Ⅴ
C. Ⅰ＋Ⅱ＋Ⅳ
D. Ⅰ＋Ⅱ＋Ⅲ＋Ⅳ

[单选题]滑油系统的备车准备工作应检查（）。Ⅰ.循环油柜油位；Ⅱ.轴承油位；Ⅲ.储油柜油位；Ⅳ.分油机

A. Ⅰ+Ⅱ
B. Ⅰ+Ⅲ
C. Ⅰ+Ⅳ
D. Ⅰ+Ⅱ+Ⅲ

[单选题]燃油系统的准备工作应检查（）。Ⅰ.柴油日用油柜油位；Ⅱ.重油日用油柜油位；Ⅲ.油舱油位；Ⅳ.柴油日用油柜加热；Ⅴ.重油日用油柜加热；Ⅵ.调整低压输送泵压力

A. Ⅰ+Ⅱ+Ⅲ+Ⅳ
B. BⅠ+Ⅱ+Ⅳ+Ⅴ
C. Ⅰ+Ⅱ+Ⅲ+Ⅳ+Ⅴ
D. Ⅰ+Ⅱ+Ⅳ+Ⅴ

[单选题]For one or two types of engine, the piston and rod can be withdrawn downwards from the cylinder into the crankcase and then out through the （）.

A. cylinder casing
B. cylinder bore
C. crankcase door
D. aperture in the cylinder block

[单选题]The gas loads on the engine structure are constrained by means of hydraulically preloaded （） which connect the bed plate, frame sections and cylinder jackets into a single unit.

A. connecting rods
B. main bearing
C. column
D. tie rod

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