【名词&注释】
柴油机(diesel engine)、优质合金钢(high quality steel)
[单选题]检查艉轴与曲轴的同轴度误差的方法不能用()。
A. 平轴法
B. 平轴计算法
C. 拉线法
D. 指针法
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学习资料:
[单选题]柴油机的重要螺栓的材料常选用优质碳钢和优质合金钢,如()。Ⅰ.15钢;Ⅱ.45钢;Ⅲ.20Cr;Ⅳ.40Cr;Ⅴ.35CrMo。
A. Ⅱ+Ⅲ+Ⅳ
B. Ⅲ+Ⅳ
C. Ⅰ+Ⅳ+Ⅴ
D. Ⅱ+Ⅳ+Ⅴ
[单选题]船舶轴系同轴度误差是指()的同轴度误差。
A. 曲轴与艉轴
B. 中间轴与艉轴
C. 曲轴与中间轴
D. 以上均是
[单选题]The way to reduce () is to build up a film of lubricant between any two surfaces that rub against each other.
A. friction
B. collision
C. inertia
D. resistance
[单选题]Friction developing between the moving parts of a governor, governor linkage and control valve will cause the governor to ().
A. react with insufficient speed droop
B. fail to react to small speed changes
C. have excessive sensitivity to small speed changes
D. remain in the neutral positio
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