【名词&注释】
基本约束条件(basic constraint conditions)
[单选题]在水平平面内,当曲柄的两个主轴承位置偏右,曲轴轴线呈右弧线弯曲(即呈“)”形)时,该曲柄的臂距差Δ-为()值。
A. 正
B. 负
C. 零
D. 正或零
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学习资料:
[单选题]轴系合理校中的基本约束条件有()。
A. 轴承负荷
B. 轴段内的应力、弯矩
C. 轴段的转角
D. A+B+C
[单选题]The cylinder cover is not provided with ().
A. fuel valve
B. lubricator
C. indicator valve
D. the starting valve
[单选题]The bearings used to support the crankshaft are generally called ()
A. line shaft bearings
B. connecting rod beatings
C. main bearings
D. support bearing
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