【判断题】
跨越道路的水平拉线,对路面中心的垂直距离,不应小于4m。
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接地体是埋在地下与土壤直接接触的金属导体。
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钳表铁芯内的剩磁只影响大电流测量,而对小电流测量无影响。
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新安装或大修后的断路器,投入运行前必须验收合格才能施加运行电压。
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不同原因引起的内部过电压,其过电压的大小、波形、频率、延续时间长短并不完全相同,因此防止对策也有区别。
【判断题】
运行过程中易发生过负荷和需要防止起动或自起动时间过长的电动机应装设过负荷保护。
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采用环形网供电所使用的高压开关柜一般习惯上称为环网柜。
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高压电动机纵差动保护工作原理与变压器纵差动保护相似。
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交流电流的频率越高,则电感元件的感抗值越小,而电容元件的容抗值越大。
【判断题】
一切调度命令是以值班调度员发布命令时开始,至受令人执行完后报值班调度员后才算全部完成。
【判断题】
高压电容器的瓷套管发生严重放电、闪络时,只要加强监视,不需要将电容器立即退出运行。
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工作过程中,工作负责人和工作许可人任何一方不得擅自变更安全措施。
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电路中,导体对电流呈现的阻碍作用称为电阻,用参数R表示。
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为确保安全,户外变电装置的围墙高度一般应不低于3米。
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导线允许通过的电流强度和导线的截面大小无关。
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过负荷、频率降低、单相断线均属于电气设备故障。
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人体直接碰到带电导体造成的触电称之为直接接触触电。
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使用绝缘棒,可以不用戴绝缘手套、穿绝缘靴。
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对运行中可能产生电火花、电弧和高温危险的电气设备和装置,不应放置在易燃的危险场所。
【判断题】
一般地,电力系统的运行电压在正常情况下不允许超过最高工作电压。
【判断题】
电力电缆铠装和护套是用来保护电缆防止外力损坏的。
【判断题】
在电缆牌和安装接线图上,只要注明电缆编号即可。
【判断题】
电力线路过电流保护的动作电流按躲过线路末端最大短路电流定。
【判断题】
变压器是一种静止的电气设备,它利用电磁感应原理将一种电压等级的交流电转变成异频率的另一种电压等级的交流电。
【判断题】
干式变压器在结构上可分为以固体绝缘包封绕组和不包封绕组。
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钢筋混凝土杆又分普通型预应力杆和等径预应力杆两种。
【判断题】
检修人员未看到工作地点悬挂接地线,工作许可人(值班员)也未以手触试停电设备、检修人员应进行质问并有权拒绝工作。
【判断题】
移动式电气设备的性能与现场使用条件无关。
【判断题】
倒闸操作中发生疑问时,根据设备实际状况可更改操作票,但不准随意解除闭锁装置。
【判断题】
带电挂接地线等,会产生强烈的电弧,将人严重灼伤。
【判断题】
变压器的效率η为输出的有功功率与输入的有功功率之比的百分数。
【判断题】
良好的摇表,在摇表两连接线(L、E)短接时,摇动手柄,指针应在“0”处。
【判断题】
电流互感器可以将电力系统的一次大电流按一定的变比变换成二次较小电流,供给测量表计和继电器。
【判断题】
在靠近线路末端附近发生短路故障时,过电流保护能正确反映。
【判断题】
工作负责人(监护人)必须始终在工作现场,对工作班人员的安全认真监护,及时纠正违反安全的动作。
【判断题】
当散发的热量与产生的热量相等时,变压器各部件的温度达到稳定,不再升高。
【判断题】
备用电源自动投入装置属于自动调节装置。
【判断题】
高压电动机发生单相接地故障后,必须将其切除。
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take a toll on，in other words ，drop out，in turn ，at risk (of) ，interfere with，be accustomed to， contribute to，cut back on ，hold on to
Although he kept trying and failing, I always [ ] the belief that he would succeed one day.
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take a toll on，in other words ，drop out，in turn ，at risk (of) ，interfere with，be accustomed to， contribute to，cut back on ，hold on to
The tax only affects people with an annual income over $200,000-[ ], it will only attect the very rich.
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They are such a(n) [ ] family- they must have been shocked when their son dyed(染) his hair pink,
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Unemployment has come down slightly, but this does not [ ]the fact that it is still a major problem
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After 10 years of full-time training, she has,finally [ ] as a professional dancer.
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make it， with open arms ，strip off，keep back，
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[ ], what is the point in taking part in the competitive event if the result is only to prove how incompetent you are?,
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Redecorating the house is a challenging task. It's necessary to [ ] the wallpaper first.
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I never really had any problems with change. On the contrary, I welcome change [ ]
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make it， with open arms ，strip off，keep back，
free of/ from ，after all，straighten up， throw away
A lot of what we [ ] is made from raw materials which are not renewable
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make it， with open arms ，strip off，keep back，
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Megan and John realized that their house was too messy for a new baby, so they decided to [ ] their house before the baby was born
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Jennifer couldn't [ ] her tears when she saw the sick children at a new blood cancer center in Virginia
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make it， with open arms ，strip off，keep back，
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We want to give all children a world [ ] violence
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advocate，involve，confine，respond，subsequent ，distinct ，intense， fulfill，circumstance， reconcile
Fortunately, the accident didn't [ ] many people, for there was little traffic at that hour.
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advocate，involve，confine，respond，subsequent ，distinct ，intense， fulfill，circumstance， reconcile
She[ ] her ambition of becoming a fashion designer after years of hard work
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advocate，involve，confine，respond，subsequent ，distinct ，intense， fulfill，circumstance， reconcile
They kept on trying their best to develop
their business, but in such [ ]market competition, they had no Idea if success would come along one day
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advocate，involve，confine，respond，subsequent ，distinct ，intense， fulfill，circumstance， reconcile
As music plays an important role in our life, many music teachers and educators [ ] taking up a musical instrument at a young age
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advocate，involve，confine，respond，subsequent ，distinct ，intense， fulfill，circumstance， reconcile
This rule should be entirely clear in the minds of everyone and should not be misunderstood under any [ ]
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advocate，involve，confine，respond，subsequent ，distinct ，intense， fulfill，circumstance， reconcile
My daughter was shy; she was afraid to ask questions,[ ] to questions in class,or talk with other children
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advocate，involve，confine，respond，subsequent ，distinct ，intense， fulfill，circumstance， reconcile
I got from him only a letter, which was put on my office desk; [ ] to the receipt of this letter I have never heard from him
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advocate，involve，confine，respond，subsequent ，distinct ，intense， fulfill，circumstance， reconcile
The duties to provide services for children in need are not [ ] to the local social services department
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advocate，involve，confine，respond，subsequent ，distinct ，intense， fulfill，circumstance， reconcile
We pray that all nations be [ ] and that all people around the world live in peace
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controversial，assess， resolve，decrease，alter，abandon，indicate，undermine，compromise， conventional
It was reported the president had [ ]to fight If war was necessary,even if it meant destroying his chances of re-election
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controversial，assess， resolve，decrease，alter，abandon，indicate，undermine，compromise， conventional
Darwin's theory of evolution remains[ ] partly because it challenges the religious belief that God created man
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advocate，involve，confine，respond，subsequent ，distinct ，intense， fulfill，circumstance， reconcile
He suggested a small but [ ] improvement on our former plan; I really appreciate it.
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in sb. 's words，count on，make sense of ，reserve for， shield from，call on， sum up， relate to ，in need，
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She held her hand above her eyes to [ ]them [ ] the sun so that she could see more clearly the man in front of her
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in sb. 's words，count on，make sense of ，reserve for， shield from，call on， sum up， relate to ，in need，
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The boy studied the signs for over an hour,but still could not [ ]them, so he turned to his teacher for help
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They [ ] the developed countries to commit more money to protecting the environment
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in sb. 's words，count on，make sense of ，reserve for， shield from，call on， sum up， relate to ，in need，
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We will continue to care for those [ ] and work to establish a society that is generous and prosperous
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in sb. 's words，count on，make sense of ，reserve for， shield from，call on， sum up， relate to ，in need，
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Many people [ ]careers and raising kids so that they forget that their marriages also need to be taken good care of
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in sb. 's words，count on，make sense of ，reserve for， shield from，call on， sum up， relate to ，in need，
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My most favorite program is the one that deals with scientific subjects that ordinary people can [ ]
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in sb. 's words，count on，make sense of ，reserve for， shield from，call on， sum up， relate to ，in need，
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Finally, I would like to [ ]by saying that it has been a tremendous pleasure to work with you all
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He is a person that you always [ ]when you need help.
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in sb. 's words，count on，make sense of ，reserve for， shield from，call on， sum up， relate to ，in need，
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This restaurant is very popular because it has some separate, smaller rooms [ ] families with small children
