北京2017年电机装配工：维修电工模拟试题

1、北京2017年电机装配工：维修电工模拟试题本卷共分为2大题50小题，作答时间为180分钟，总分100分，60分及格。一、单项选择题（共 25 题，每题 2 分，每题的备选项中，只有 1 个事最符合题意） 1、电流平衡法是指对功率较大的三角形联结的电动机，先将定子绕组的一个接点拆开，再逐相通入低电压大电流的交流电，测量其电流，其中_的一相即为断路相。 A电流小 B电流大 C电流恒定 D较大 2、三相异步电动机定子重绕选择绕组形式时，功率大于15kW的三相电动机，一般采用_绕组。 A单层短节距 B单层长节距 C单层短节距 D双层短节距3、制定装配工艺规程的第一步是_。 A研究产品装配图及验收技术标准 B确定部件或产品的装配方法 C划分装配单元及规定最合理的装配顺序 D划分装配工序 4、直流电动机换向器火花过大时，应_。 A更换电刷 B调节电刷的机械位置 C增大电刷与换向器的接触电阻 D改变换向极的极性5、转子绕组绑扎钢丝时，每绑扎_匝用石棉纸隔开，以减少涡流损耗。 A8 B10 C15 D20 6、The destruction of our natural resources and c

2、ontamination of our food supply continue to occur, largely because of the extreme difficulty in affixing (把……固定) legal responsibility on those who continue to treat our environment with reckless abandon (放任). Attempts to prevent pollution by legislation, economic incentives and friendly persuasion have been met by lawsuits, personal and industrial denial and long delays-not only in accepting responsibility, but more importantly, in doing something about it.It seems that only when g

3、overnment decides it can afford tax incentives or production sacrifices is there any initiative for change. Where is industry’ s and our recognition that protecting mankind’ s great treasure is the single most important responsibility If ever there will be time for environmental health professionals to come to the frontlines and provide leadership to solve environmental problems, that time is now.We are being asked, and, in fact, the public is demanding that we take positive action.

4、It is our responsibility as professionals in environmental health to make the difference. Yes, the ecologists, the environmental activists and the conservationists serve to communicate, stimulate thinking and promote behavioral change. However, it is those of us who are paid to make the decisions to develop, improve and enforce environmental standards, I submit, who must lead the charge.We must recognize that environmental health issues do not stop at city limits, county lines, state or even fed

5、eral boundaries. We can no longer afford to be tunnel-visioned in our approach. We must visualize issues from every perspective to make the objective decisions. We must express our views clearly to prevent media distortion and public confusion.I believe we have a three-part mission for the present. First, we must continue to press for improvements in the quality of life that people can make for themselves. Second, we must investigate and understand the link between environment and health. Third,

6、 we must be able to communicate technical information in a form that citizens can understand. If we can accomplish these three goals in this decade, maybe we can finally stop environmental degradation, and not merely hold it back. We will then be able to spend pollution dollars truly on prevention rather than on bandages. Which of the following, according to the author, should play the leading role in the solution of environmental problems () ALegislation and government intervention. BThe indust

7、ry's understanding and support. CThe efforts of environmental health professionals. DThe cooperation of ecologists, environmental activists and conservationists. 7、笼型转子焊接时，不同的笼条采用不同的焊料。纯铜笼条一般采用_钎料。 A铅 B银 C铜磷 D锡 8、湿热带型电机可装有_。 A散热器 B风扇 C防潮加热器 D漏电保护器 9、三相异步电动机外壳带电原因有_、绕组严重受潮和绝缘老化、引出线与接线盒接地、线圈端部碰端盖等。 A接线错误 B安装错误 C电磁感应 D未接地 10、发电机大修,一般为每_年一次 A二 B四 C五11、一台2极电机一个圆周的机械角度所对应的电角度为_ A1080 B720 C360 D1440 12、M147型汽轮发电机条式线圈包带机上所有的滚动轴承均用_号钙基润滑脂润滑。 A1 B2 C3 D4 13、无纬带绑扎机主要用于中心高_的转子绕组端部绑扎无纬带。 A130250mm B2503

8、00mm C280400mm D280450mm14、一般电动机的轴承运行（）后就应该清洗轴承或重新填加新的润滑脂。 A半年 B4000小时 C2500—3000小时 15、以谋生为目的的劳动是_，它是指个人在某职业活动中付出的劳动力。 A职业劳动 B生存劳动 C有偿劳动 D无偿劳动 16、中频电机转轴的轴承热套温度为_。 A150200 B100110 C180220 D200210 17、一台36槽电动机的槽距角为30。，该电机的极数为_。 A2极 B4极 C6极 D8极 18、凸极式同步电动机的转子由转轴、磁极和_等组成。 A磁轭 B集电环 C阻尼环 D转子冲片 19、三相交流换向器变速电动机的特点之一是这种电动机属于_电动机。 A异步 B同步 C直流 D步进 20、匝间绝缘的试验中因非被试两相绕组上也有感应电压，它们的出线端不能_。 A断开 B接地 C短接 D悬空 21、下列选项中，不属于孔的加工方式的是_。 A磨孔 B钻孔 C铰孔 D扩孔 22、额定电压为6kV及以上高压电机的定子绕组表面要进行防电晕处理，以保证电晕放电的起始电压不低于_倍额定电压。 A1.5 B

9、2 C2.5 D323、按工艺规定，湿热带型电机整个定子：B级电动机浸5152-3绝缘漆绝缘处理_次。 A2 B3 C4 D5 24、三相异步电动机振动的原因不包括：_。 A转子不平衡 B电动机缺相运行 C轴伸弯曲或联轴器、带轮安装不符合要求 D定子绕组通路25、主极铁心的紧固有铆接、焊接和_3种形式。 A压接 B螺杆紧固 C粘接 D熔压二、多项选择题（共 25 题，每题 2 分，每题的备选项中，有 2 个或 2 个以上符合题意，至少有1 个错项。错选，本题不得分；少选，所选的每个选项得 0.5 分） 1、正等测_的轴间角均为120。 A透视图 B轴测图 C三视图 D平面图 2、并励直流电动机降低电枢电压起动_。 A起动转矩减小 B增加起动转矩 C增加主磁通 D减少起动时间3、防爆电机安装前须用_V绝缘电阻表测量电机绕组的对地绝缘电阻。 A500 B1000 C2500 D1500 4、电机装配图应用于电机新产品设计、旧电机改造、电机_等方面。 A装配工具维修 B绝缘材料选用 C装配机器维修和改造 D制造和维修、技术交流5、在电介质上施加直流电压后，由电介质的电导所决定的电流就是（）。 A吸收电流 B电容电流 C泄漏电流 6、发电机在干燥过程中，应定时记录绝缘电阻、铁心温度、绕组温度和排出空气温度的数值，并绘制定子温度和_的变化曲线。 A干燥电压 B干燥电流 C绝缘电阻 D直流电阻 7、真空泵在给定条件下，经充分抽气后能达到的稳定最低压力，称为_。 A抽气

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