问题 问答题

(二)


某电气安装工程项目,业主与某电力工程公司签订了工程项目总承包合同,该工程项目的变压器采用自耦式变压器(容量为800kVA),电机采用三相异步电动机。
该工程项目的设计单位对变压器的采购编制了采购计划,经业主批准后,由项目经理进行采购。工程监理单位负责对变电压检验的组织工作。变压器运抵施工现场后,进行了开箱验收,经验收合格后,按吊装、吊芯检查、就位、试验、干燥的程序和要求进行安装。变压器安装完毕后,进行了绝缘油的击穿电压试验和交流耐压试验。绝缘油在试验时,温度一直保持在40℃左右,且在清洗注油后即开始加电压试验;变压器安装完成后静止5小时开始进行交流耐压试验。
三相异步电动机在检查过程中经电气试验发现质量可疑。

变压器按照绕组数目可分为哪几类该变压器是否应吊芯检查说明理由。

答案

参考答案:变压器按绕组数目可分为双绕组变压器、三绕组变压器、多绕组变压器和自耦变压器。该变压器必须做吊芯检查。理由:变压器容量为560kVA以上的变压器均应吊芯检查。

单项选择题
阅读理解

It’s really true what people say about English politeness: it’s everywhere. When squeezing  past someone in a narrow passage, people say “sorry”. When getting off a bus, English passengers say “thank you” rather than the driver. In Germany, people would never dream of doing these things. After all, squeezing past others is sometimes unavoidable, and the bus driver is only doing his job. I used to think the same way, without questioning it, until I started traveling to the British Isles, and here are some more polite ways of interacting  with people in UK.

People thank each other everywhere in England, all the time. When people buy something in a shop, customer and shop assistant in most cases thank each other twice or more. In Germany, it would be exceptional to hear more than one thank you in such a conversation. British students thank their lecturers when leaving the room. English employers thank their employees for doing their jobs, as opposite to Germans, who would normally think that paying their workers money is already enough.

Another thing I observed during my stay was that English people rarely criticize others. Even when I was working and mistakes were pointed out to me, my employers emphasized several times but none of their explanations were intended as criticism. It has been my impression that by avoiding criticism, English people are making an effort to make others feel comfortable. This also is showed in other ways. British men still open doors for women, and British men are more likely to treat women to a meal than German men. However, I do need to point out here that this applies to English men a bit more than it would to Scottish men! Yes, the latter are a bit tightfisted.

小题1:What is the author’s attitude towards English politeness?

A.He thinks it is unnecessary.

B.He thinks little of it.

C.He appreciates it very much.

D.He thinks it goes too far.小题2:What can be inferred from the passage?

A.German men never treat a woman to dinner.

B.The author think it’s unnecessary to say “thank you” to the bus driver.

C.In Germany, employers often say “thank you” to employees for their job.

D.Germans think it is unnecessary to thank workers because payment is enough.小题3:We can learn from the last paragraph that Scottish men ______.

A.like to fight with each other

B.treat women in a polite way

C.are as generous as English men

D.are unwilling to spend money for women小题4:The author develops the text through the method of ______.

A.making comparisons

B.telling stories

C.giving reasons

D.giving examples