某新建电厂一期安装两台300MW机组,采用发电机-变压器单元接线接入厂内220kV屋

题型:单项选择题

问题:

某新建电厂一期安装两台300MW机组,采用发电机-变压器单元接线接入厂内220kV屋外中型配电装置,配电装置采用双母线接线。在配电装置架构上装有避雷针进行直击雷保护,其海拔高度不大于1000m。主变中性点可直接接地或不接地运行,配电装置设计了以水平接地极为主的接地网,接地电阻为0.65Ω,配电装置(人脚站立)处的土壤电阻率为100Ω.m。

在主变压器高压侧和高压侧中性点装有无间隙金属氧化锌避雷器,请计算确定避雷器的额定电压值,并从下列数值中选择正确的一组?()

A.189kV,143.6kV

B.189kV,137.9kV

C.181.5kV,143.6kV

D.181.5kV,137.9kV

考点:注册电气工程师发输变电专业注册电气工程师发输变电专业2013年(上)专业案例真题(案例题(选择题))
题型:单项选择题

心理测量的误差主要来源有()。

A.主试者素质

B.施测条件

C.应试者动机

D.应试者生理状态

E.以上都是

题型:单项选择题


B
A sign is another kind of language. Here are some of them that you see on the roads.
Number one is a sign with the number thirty on it. When drivers see this sign, they must not go at more than thirty kilometers an hour. We see this sign when we are getting near a town. Number two is a sign that we’re near a crossing. We must drive carefully. Number three is a sign that there is a bend in the road. Again, we must drive slowly and carefully. It is not safe to go round a bend very fast. Number four is a sign that there is another road coming in from the right. There is a junction at this place. Number five is a sign that there is a hill and number six is a sign that the road gets narrow. Drivers must go slowly and carefully. Number seven has the word “SCHOOL” on it. This is a sign that there is a school at the side of the street or the road. Perhaps there are children going to or leaving school. So drivers must look carefully and go slowly. Number eight is a sign with the letter “P” on it. The letter “P” means “Parking”. At some places, there’re the signs “No parking” or “No waiting”. If a driver leaves his car near one of these signs, a policeman may come and write down the number of his car.
61. At the places where you see Sign 1, ________.
A. you are already out of a town
B. you still have thirty kilometers to go
C. there must be a town thirty kilometers away
D. there must be many houses and buildings not far away
62. There stands Sign 2 near a place where________.
A. two roads cross            B. people can cross the road
C. the roads get narrow        D. there are no traffic lights
63. You have to drive not only slowly but also carefully when you find________.
A. each of the eight signs              B. either of Signs 2 and 3
C. all of Signs 3, 5, 6 and 7           D. any of Signs 3, 5, 6 and 7
64. A driver can leave his car________.
A. near Sign 8 at any time
B. near a sign with “No parking” on it
C. near a sign with “No waiting” if there’re no police there
D. near a sign with “P” on it in the daytime
65. People put these signs on the roads to________.
A. show drivers the way           B. stop cars going too fast
C. make driving even safer         D. learn another kind of language
题型:单项选择题

开发策略的制定必须考虑很多问题,但下面哪个问题可以不考虑

A.企业必须建立信息系统总体规划

B.企业必须拒绝高层管理人员参与

C.建立畅通的信息通道

D.加强数据处理部门与管理部门之间的联系

题型:单项选择题

环境监测计划包括的内容?

题型:单项选择题

在【工具】面板中,单击()按钮,将鼠标移到时间线的指针位置单击,即可以剪切该素材。

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