维修电工竞赛试题初级维修电工职业考试大纲一选择题:1 电气图包括:电路图、功能表图和( A )等。
A 系统图和框图B 部件图C 元件图D 装置图2电路图是根据( D )来详细表达其类容的。
A 逻辑图B 位置图 C功能表图 D系统图和框图3 电气符号的图形有( D )种。
A1 B2 C3 D44 生产机械的电路图可表示( A)。
A 电气原理 B接线图 C 安装位置 D接线表5 生产机械的接线图有:单元接线图、互连接线图和( D)。
A端子接线表 B互连接线表 C位置接线图 D端子接线图6 电力拖动辅助电路的阅读步骤的第一步是( A )。
A看清电源的种类 B搞清辅助电路的原理C看电气元件间的关系 D看其他电气元件7 阅读电气安装图的主电路时，要按( B)顺序。
A 从下到上 B从上到下 C从左到右 D从前到后8 若将一段电阻为R的导线均匀拉长至原来的二倍，则其电阻值为(C )A 2RB R/2C 4RD R/49 电流的方向就是( C )。
A负电荷定向移动的方向 B 电子定向移动的方向C 正电荷定向移动的方向D 正电荷定向移动的反相方向10 关于点位的概念，( C)的说法正确的是。
A点位就是电压 B点位是绝对值C 点位是相对值D 参考点的点位不一定等于零11 电压Uab=10V的意义是( B )。
A 电场力将电荷从a点移到b点做的功是10Jfield is downwind, brooding House separate from the breeding shed, and ... Building chicken farms must also consider the construction of chicken manure treatment facilities such as septic tanks, methane-generating pit, do not let the chicken manure directly. Five to do a disease prevention and control, do not cut corners. Built into the chicken in chicken farm, will be required to do a variety of vaccine injections and disinfection in chicken farm, do not hold the chance, and do scientific farming. Reasonable problems in building a chicken coop hen house layout, can provide a good environment for chicken, making its full productive potential, so other than in understanding the physiological characteristics of the chicken itself, and must be properly planned and constructed sheds. A chicken layout considerations 1. Sites to choose away from populated areas, traffic convenient, away from the road 2. Gaozao terrain, a lot of sunshine. Winter sun as possible, summer wind, and not after the rain water. Larger, leaving room for development 3. Abundant water resources pollution-free, easy to access, sufficient power is guaranteed 4. Building structure, the economy, saving money, and saving energy, it is facing in accordance with local environmental and physiological condition, lighting is good,easy to ventilation, easy to operate, so conducive to cooling in the summer, to insulation in winter cold 5. Layout of premises should be reasonable, do distinguish betweenB 电场力将1C正电荷从a点移到b点做的功是10JC 电场力将电荷从a点移到参考点做的功是10JD电场力将电荷从b点移到参考点做的功是10J12一个电阻接在内阻为0.1?、电动势为1.5v的电源上时，流过电阻的电流为1A，则该电阻上的电压等于( B)V。
(A)1 (B) 1.4 ( C) 1.5 (D) 0.113电阻R1,R2, R3串联后接在电源上，若电阻上的电压关系U1>U2>U3，则三个电阻值间的关系是( B)。
AR<1R2<R3 B.R1>R3>R2 C.R1<R3<R2 D.R1>R2>R315 在交流电路中( D)平均值。
A电压才有 B电动势才有C电流才有 D电压，电动势，电流都有16 相正弦交流电压的最大值为311V，它的有效值是(B )。
A .200V B.220V C.380V D.250V17 磁感应强度的单位是( C )A安匝 B安匝/米 C特 D韦18磁通的单位是( C )A. A/mB. AmC.WbD.T 19 常用电工指示仪表按工作原理分类，主要有( B )类。
A.3B.4C.5D.6 20 电磁系测量机构主要结构是( B)A.固定的线圈，可动的磁铁 B固定的线圈，可动的铁片C可动的磁铁，固定的铁片 D可动的线圈，固定的线圈21磁电系仪表的特点是(A ),只能测直流 ,只能测交流,只能测脉动直流 ,即可测直流，又可测交流22磁电系测量机构带半导体整流器构成的仪表叫( C )仪表。
A.电动系B.电磁系C. 整流系 D磁电系23 电工钳、电工刀、螺钉旋具属于( C )A.电工基本安全用具B.电工辅助安全用具field is downwind, brooding House separate from the breeding shed, and ... Building chicken farms must also consider the construction of chicken manure treatment facilities such as septic tanks, methane-generating pit, do not let the chicken manure directly. Five to do a disease prevention and control, do not cut corners. Built into the chicken in chicken farm, will be required to do a variety of vaccine injections and disinfection in chicken farm, do not hold the chance, and do scientific farming. Reasonable problems in building a chicken coop hen house layout, can provide a good environment for chicken, making its full productive potential, so other than in understanding the physiological characteristics of the chicken itself, and must be properly planned and constructed sheds. A chicken layout considerations 1. Sites to choose away from populated areas, traffic convenient, away from the road 2. Gaozao terrain, a lot of sunshine. Winter sun as possible, summer wind, and not after the rain water. Larger, leaving room for development 3. Abundant water resources pollution-free, easy toaccess, sufficient power is guaranteed 4. Building structure, the economy, saving money, and saving energy, it is facing in accordance with local environmental and physiological condition, lighting is good, easy to ventilation, easy to operate, so conducive to cooling in the summer, to insulation in winter cold 5. Layout of premises should be reasonable, do distinguish betweenC.电工基本工具D.一般防护安全用具24测量两个零件相配合表面间的间隙的量具是( D)A.钢尺B.角尺C. 千分尺D.塞尺25选择绝缘电阻表的原则是( D)A.绝缘电阻表额定电压大于被测设备工作电压B.一般都选择1000V的绝缘电阻表C.选用准确度高，灵敏度高的绝缘电阻表D.绝缘电阻表测量的范围与被测绝缘电阻的范围相适应26 万用表欧姆挡的红表笔与( B)相连A.内部电流的正极B.内部电流的负极C.表头的正极D.黑表笔27 使用直流电压表时，除了使电压表与被测电路并联外，还应使电压表的“+”极与被测电路的( A )相连A.高电位端 B .低电位端C 中间电位端 D.零电位端28制造电机、电器的线圈应选用的导线类型是( C )A.电气设备用电线电缆B.裸铜软编织线C.电磁线D.橡套电线29长距离架空输电线路可选导线的型号是( D )A.TJB.TRJC.LJD.LGJ30 绝缘油中用量最大、用途最广的是( C )A.桐油B.硅油C.变压器油D.亚麻油31 BLVV塑料护套线中的塑料主要作用是 ( B )A.绝缘B.绝缘和护层C.支撑固定D.承受机械机械外力和绝缘双重作用32 制作电视电器的绝缘结构零部件，需较高的机械性能和电气性能、且耐热等级为F级的层压布板，选用( C)最合适。