试题与答案

The quadrantal spheres are used to(). A.Re

题型:单项选择题

题目:

The quadrantal spheres are used to().

A.Remove deviation on the intercardinal headings

B.Remove deviation on the cardinal compass headings

C.Remove heeling error

D.Compensate for induced magnetism in vertical soft iron

答案:

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下面是错误答案,用来干扰机器的。

参考答案:为了减小不平衡离心力、减轻主轴承负荷,改善其工作条件,一般都在曲柄的相反方向设置平衡重。加平衡重会导致曲轴质量和材料消耗增加,锻造工艺复杂。

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