江苏省2017年电机装配工：继电器保护工考试试卷

江苏省2017年电机装配工：继电器保护工考试试卷本卷共分为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、影响电机绝缘电气性能的因素：一是材料、结构、工艺、试验等制造过程中的影响因素；二是工作电压、场强、__、工作状态及运行时间等运行过程中的影响因素。

A．运输环境、机械应力、电压频率B．工作环境、机械压力、电压频率C．工作环境、机械应力、检修频率D．工作环境、机械应力、电压频率2、异步电动机的检查试验项目有：绕组对机壳及绕组相互间绝缘电阻的测定；绕组在实际的冷状态下直流电阻的测定；空载试验；__试验；振动的测定等。

A．机械B．旋转C．停转D．堵转3、为了求出绕组数据，除按照给定的定子铁心量出外径、内径、铁心长、定子槽数、槽底至外径处的距离以及槽形尺寸外，还应知道电动机电源的频率及电压、__、功率等。

A．体积B．数量C．质量D．极数4、下列结构名称不属于包带机构部分的是__。

A．床身B．包带装置C．升降摆角靠模D．床架5、主极铁心紧固时，一般铆接用于长__以下的主极铁心。

A．200mmB．300mmC．400mmD．500mm6、同心式绕组的特点是嵌线很方便，可两边同时嵌入槽内，便于__生产。

A．大规模B．现代化C．电气化D．机械化7、电枢绕组导体线规的选择时，由于工艺上的原因，单根导线的截面积不宜过大。

圆线直径不宜大于__mm。

A．1.5～1.62B．1.5～2.5C．2.5～3.5D．2.5～4.58、集电环的常见故障有：集电环工作面上出现__、集电环上出现高温、集电环松动等。

A．灰尘B．炭粉C．严重磨损D．轻微磨损9、单相异步电动机应按照给定的定子铁心量出外径、内径、铁心长、定子槽数、槽底至外径处的距离以及__等数据。

A．绕组长度B．槽形C．尺寸D．槽形尺寸10、单相异步电动机的电动机空载能起动的故障原因不包括：__。

A．副绕组断路B．离心开关触点合不上C．电容器击穿D．电动机过载11、伸平右手，大拇指指向导体运动方向，其余四指指向感应电动势方向，则手心迎向__。

A．受力方向B．电流方向C．电压方向D．磁感线方向12、电机三相绕组电流平衡试验时，如果三相电流的最大值或最小值与平均值之差不超过平均值的__，且数值与同型号、同规格的电机接近则为合格。

A．±1%B．±3%C．±5010D．+10%13、岗位安全技术教育是指对从事各种工作的工人进行操作技术教育。

__14、__主要由蜗杆、螺母和机架组成。

A．齿轮传动B．螺纹传动C．螺旋传动D．链传动15、利用万用表来识别晶体二极管的极性依据的是二极管的__。

A．半导体特性B．额定值C．单向导电性D．参数16、在__端电压、励磁电流及负载不变的情况下，将电动机正、反转，并逐步调整刷架位置，直到电机上正、反转的电枢端电压相等时，电刷的位置就是中性位置。

A．同步发电机B．异步电动机C．直流发电机D．直流电动机17、一般规定，交变湿热试验分__周期，每个周期包括升温、高温高湿、降温、低温高湿4个阶段。

A．8B．11个C．14D．1618、电磁调速异步电动机构成部分之一为__。

A．控制器B．绕线转子异步电动机C．推力轴承D．阻尼轴承19、带传动是由传动带和__组成的。

A．带轮B．链条C．齿轮D．齿条20、下列选项中不是带传动优点的有__。

A．具有过载保护作用B．结构简单，使用维护方便C．传动平稳，无噪声D．效率较高21、成品试验包括__和型式试验。

A．检查试验B．电机试验C．成品试验D．样品试验22、The destruction of our natural resources and contamination 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 government 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 beingasked,and,in fact,the public is demanding that we take positive action.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 federal 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, 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()A．Legislation and government intervention.B．The industry's understanding and support.C．The efforts of environmental health professionals.D．The cooperation of ecologists,environmental activists and conservationists. 23、同步电动机的型式试验项目不包括：__。

A．同步电动机短时够电流及过载试验B．转动惯量的测定C．绕组电抗的时间常数的测定D．功率因数的测定24、读装配图的主要要求之一是了解电机各组成部分的连接形式、装配关系和__顺序。

A．试验B．检查C．生产D．装拆25、估计单相异步电动机的额定功率时，当D=94mm时，PN≈__。

A．40～90WB．180～250WC．250～600WD．600～800W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。