国家职业资格-中级维修电工试题1(含答案)

为进一步强化公司安全生产、文明施工管理，切实落实安全生产责任，防止重大安全事故发生，保障企业和员工的生命和财产安全manufacturersdrawingsboltfastenedinthecylinderandoutercylinder.Cylindercylinderinthedrainpipeinstallationandmeasuringcomponentleads.6.4.4.3bladecarrier,partitionsandlowerinstallationcheckthesealingringofthesealandsprings,whichshallconformtothetechnicalrequirementsmanufacturersdrawings.CylindergasketonthemountingbracketssupportingtheGroupassembled,thelugsshallbenoBurronthesurface,andotherdebris.Departmentsuiteinplacetomeasuresurfaceandinnercylindersurfaceheightdifference,comparedwiththeoriginalvaluesconfirmthelocation.6.4.4.4lowerbearingandthrustbearinginstallationcleanbearingandbearing,thrustbearingjoints,cleanthemwithathinlayerofturbineoil,andthenliftingittobits.6.4.4.5highandmiddlepressurecylinderoverittotheend(forhighpressurerotorandlowpressurechangeflangegasketwithoutconnectionunit)rotorsandrotorflangegasketconnectionandthereisnoconnection,sotherotorinplacecases,rotorsinplacemustbehighandmiddlepressurecylindertogetherwiththeChamberoverittotheend.Jackintheboxthatareinstalledonapush-pulldeviceofadjustingthehighandmediumpressurecylindertoendoverandaroundtosetupindicatorstomonitordata,generaldataaboutthedifferencemustnotexceed0.02mm.Topreventcylinderaboutoutofsyncoverthesituation,takethefollowingmeasures:a)overJackusesthesamepump,evenly.B)lefttosetupindicatorstomonitoroverquantity.TopreventthemovementovertheChamberwhentheplaten,atthetopofthefrontbearingplateinstalledtight,thenanchorbasenexttothecorresponding国家职业资格-中级维修电工试题1红色答案代表正确的参考答案1、判断由电流产生的磁场的方向用（）。左手定则右手定则电动机定则安培定则2、一含源二端网络，测得其开路电压为100V，短路电流为10A，当外接10Ω负载电阻时，负载电流是（）。10A5A15A20A3、条形磁体中，磁性最强的部位是（）。中间两极两侧面内部4、一电流源的内阻为2，当把它等效变换成10V的电压源，则此电流源的电流是（）。5A2A10A2.5A的电压源变换成电流源时，电流源的电流和内阻是（）。5、电动势为10V、内阻为210A，220A，25A，22A，56、正弦交流电压U=100sin（628t+60°）V，它的频率为（）。100Hz50Hz为进一步强化公司安全生产、文明施工管理，切实落实安全生产责任，防止重大安全事故发生，保障企业和员工的生命和财产安全manufacturersdrawingsboltfastenedinthecylinderandoutercylinder.Cylindercylinderinthedrainpipeinstallationandmeasuringcomponentleads.6.4.4.3bladecarrier,partitionsandlowerinstallationcheckthesealingringofthesealandsprings,whichshallconformtothetechnicalrequirementsmanufacturersdrawings.CylindergasketonthemountingbracketssupportingtheGroupassembled,thelugsshallbenoBurronthesurface,andotherdebris.Departmentsuiteinplacetomeasuresurfaceandinnercylindersurfaceheightdifference,comparedwiththeoriginalvaluesconfirmthelocation.6.4.4.4lowerbearingandthrustbearinginstallationcleanbearingandbearing,thrustbearingjoints,cleanthemwithathinlayerofturbineoil,andthenliftingittobits.6.4.4.5highandmiddlepressurecylinderoverittotheend(forhighpressurerotorandlowpressurechangeflangegasketwithoutconnectionunit)rotorsandrotorflangegasketconnectionandthereisnoconnection,sotherotorinplacecases,rotorsinplacemustbehighandmiddlepressurecylindertogetherwiththeChamberoverittotheend.Jackintheboxthatareinstalledonapush-pulldeviceofadjustingthehighandmediumpressurecylindertoendoverandaroundtosetupindicatorstomonitordata,generaldataaboutthedifferencemustnotexceed0.02mm.Topreventcylinderaboutoutofsyncoverthesituation,takethefollowingmeasures:a)overJackusesthesamepump,evenly.B)lefttosetupindicatorstomonitoroverquantity.TopreventthemovementovertheChamberwhentheplaten,atthetopofthefrontbearingplateinstalledtight,thenanchorbasenexttothecorresponding60Hz628Hz7、纯电感或纯电容电路无功功率等于（）。单位时间内所储存的电能电路瞬时功率的最大值电流单位时间内所做的功单位时间内与电源交换的有功电能8、电力系统负载大部分是感性负载，要提高电力系统的功率因数常采用（）。串联电容补偿并联电容补偿串联电感并联电感9、一阻值为3、感抗为4的电感线圈接在交流电路中，其功率因数为（）。0.30.60.50.410、一台电动机的效率是0.75，若输入功率是2kW时，它的额定功率是（）kW。1.522.41.711、疏失误差可以通过（）的方法来消除。校正测量仪表正负消去法加强责任心，抛弃测量结果采用合理的测试方法12、使用检流计时发现灵敏度低，可（）以提高灵敏度。适当提高张丝张力适当放松张丝张力减小阻尼力矩增大阻尼力矩为进一步强化公司安全生产、文明施工管理，切实落实安全生产责任，防止重大安全事故发生，保障企业和员工的生命和财产安全manufacturersdrawingsboltfastenedinthecylinderandoutercylinder.Cylindercylinderinthedrainpipeinstallationandmeasuringcomponentleads.6.4.4.3bladecarrier,partitionsandlowerinstallationcheckthesealingringofthesealandsprings,whichshallconformtothetechnicalrequirementsmanufacturersdrawings.CylindergasketonthemountingbracketssupportingtheGroupassembled,thelugsshallbenoBurronthesurface,andotherdebris.Departmentsuiteinplacetomeasuresurfaceandinnercylindersurfaceheightdifference,comparedwiththeoriginalvaluesconfirmthelocation.6.4.4.4lowerbearingandthrustbearinginstallationcleanbearingandbearing,thrustbearingjoints,cleanthemwithathinlayerofturbineoil,andthenliftingittobits.6.4.4.5highandmiddlepressurecylinderoverittotheend(forhighpressurerotorandlowpressurechangeflangegasketwithoutconnectionunit)rotorsandrotorflangegasketconnectionandthereisnoconnection,sotherotorinplacecases,rotorsinplacemustbehighandmiddlepressurecylindertogetherwiththeChamberoverittotheend.Jackintheboxthatareinstalledonapush-pulldeviceofadjustingthehighandmediumpressurecylindertoendoverandaroundtosetupindicatorstomonitordata,generaldataaboutthedifferencemustnotexceed0.02mm.Topreventcylinderaboutoutofsyncoverthesituation,takethefollowingmeasures:a)overJackusesthesamepump,evenly.B)lefttosetupindicatorstomonitoroverquantity.Topreventthemov