【名词&注释】
螺旋桨(propeller)、关键是、排气阀阀杆
[单选题]排气阀阀杆磨损超过标准要求时,可采用()工艺修复阀杆。也可以采用喷涂或喷焊工艺修复。
A. 镀铬或镀铁
B. 焊接
C. 堆焊
D. 镀铁
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学习资料:
[单选题]为了检验螺旋桨的螺距,关键是应测量计算出()螺距。
A. 局部
B. 截面
C. 桨叶平均
D. 螺旋桨总平均
[单选题]Diesel engines are started by supplying () into the cylinders in the appropriate sequence for the required direction.
A. fuel oil
B. diesel oil
C. compressed air
D. jacket water
[单选题]The position of the piston parts in relation to each other is secured by means of () in the crown.
A. a mark
B. a bolt
C. a dowel pin
D. a measuring tool
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