毕业季招聘南车株洲所机械类笔试题目加答案

2012春季招聘南车株洲所机械类笔试题目

1.装配方法:装配方法有：互换装配法、分组装配法、修配法、调整法四种。

2.硬度测试法: 布氏硬度、洛氏硬度和维氏硬度等测试方法

3.构件承载能力的衡量指标: 强度,刚度,稳定性三方面

4.滚动轴承内外的配合: 轴承内孔与轴的配合采用基孔制，轴承外径与外壳孔的配合采用

基轴制

5.带轮的张紧方法:1、调整中心距w 定期张紧w 自动张紧2、使用张紧轮

6.锻造时最高温度始锻温度停止锻造温度分别叫什么尾锻温度

7.轴采用何种热处理方法: 调质处理

8.几何形状误差的种类;直线度、平面度、圆度、圆柱度、线轮廓度、面轮廓度6类其中

前3类最常见

9.

10.丰田式生产管理的核心;1）长远的理念，2）正确的步骤会产生正确的结果，3）通过提

升你的员工增加企业的价值。4）不断解决根本问题会促进整体学习。下面是这些原则和一些简单的描述：

11.

12.塞规测量的原理;：塞规也就是以中径的极限偏差。来检测螺纹的合格与否

13.回火的概念回火目的：消除淬火内应力降低脆性稳定工件的尺寸提高硬度提高塑

性和韧性获得工件最终需要的力学性能。淬火：将工件加热保温后，在水、油或其它无机盐、有机水溶液等淬冷介质中快速冷却。淬火后钢件变硬，但同时变脆。

回火：将淬火后的钢件在高于室温而低于650℃的某一适当温度进行长时间的保温，再进行冷却。

14.

15.按照基准统一原则选用精基准的优点？制图中如何选用设计基准？

16.1、简化了各个不同工序的夹具设计，因为都使用同样的夹具即可

2、减少基准转换，便于保证各加工表面的相互位置精度。

17.：首选大的基准面，重要的尺寸为设计基准

18.

19.Homework has never been terribly popular with students and even many parents, but in

recent years it has been particularly scorned. School districts across the country, most recently Los Angeles Unified, are revising their thinking on his educational ritual.

Unfortunately, L.A. Unified has produced an inflexible policy which mandates that with the exception of some advanced courses, homework may no longer count for more than 10% of

a student’s academic grade.

20.This rule is meant to address the difficulty that students from impoverished or chaotic

homes might have in completing their homework. But the policy is unclear and contradictory.

Certainly, no homework should be assigned that students cannot do without expensive equipment. But if the district is essentially giving a pass to students who do not do their homework because of complicated family lives, it is going riskily close to the implication that standards need to be lowered for poor children.

21.District administrators say that homework will still be a pat of schooling: teachers are

allowed to assign as much of it as they want. But with homework counting for no more than

10% of their grades, students can easily skip half their homework and see vey little difference on their report cards. Some students might do well on state tests without completing their homework, but what about the students who performed well on the tests and did their homework? It is quite possible that the homework helped. Yet rather than empowering teachers to find what works best for their students, the policy imposes a flat, across-the-board rule.

22.At the same time, the policy addresses none of the truly thorny questions about homework.

If the district finds homework to be unimportant to its students’ academic achievement, it should move to reduce or eliminate the assignments, not make them count for almost nothing. Conversely, if homework does nothing to ensure that the homework students are not assigning more than they are willing to review and correct.

23.The homework rules should be put on hold while the school board, which is responsible for

setting educational policy, looks into the matter and conducts public hearings. It is not too late for L.A. Unified to do homework right.

24.21.It is implied in paragraph 1 that nowadays homework_____.

25.[A] is receiving more criticism

26.[B,],is no longer an educational ritual

27.[C]is not required for advanced courses

28.[D]is gaining more preferences

29.22.L.A.Unified has made the rule about homework mainly because poor students_____.

30.[A]tend to have moderate expectations for their education

31.[B,],have asked for a different educational standard

32.[C]may have problems finishing their homework

33.[D]have voiced their complaints about homework

34.

35.23.According to Paragraph 3,one problem with the policy is that it may____.

36.

37.[A]discourage students from doing homework

38.

39.[B,],result in students' indifference to their report cards

40.

41.[C]undermine the authority of state tests