
【名词&注释】
相对运动(relative motion)
[单选题]环槽端面过度磨损时,可在活塞上一道环槽采用_______修理
A. 光车
B. 修理尺寸法
C. 恢复尺寸法
D. 镶垫环
查看答案&解析
点击获取本科目所有试题
举一反三:
[单选题]液压马达的实际输出扭矩小于理论输出扭矩是因为( )。
A. 油在马达内流动存在压力损失
B. 油在马达内流动存在漏泄损失
C. 液压马达相对运动部件存在摩擦损失
D. A+C
[单选题]If the compensating needle valve of a hydraulic governor is opened more than necessary the governor will .
A. have a larger than normal dead band
B. produce excessive speed response to a load change
C. respond slowly to any change in engine load
D. stabilize engine speed at the new governor setting
本文链接:https://www.zhukaozhuanjia.com/download/nlxz7z.html