问题 问答题 简答题

压力容器设备完好的标准是什么﹖

答案

参考答案:

运行正常,效能良好。其具体标志为:

①容器的各项操作性能指标符合设计要求,能满足生产的需要。

②操作过程中运转正常,易于平稳地控制操作参数。

③密封性能良好,无泄漏现象。

④带搅拌的容器,其搅拌装置运转正常,无异常的振动和杂音。

⑤带夹套的容器,加热或冷却其内部介质的功能良好。

⑥换热器无严重结垢。列管式换热器的胀口、焊口;板式换热器的板间;各类换热器的法兰连接处均能密封良好,无泄漏及渗漏。

(2)装备完整,质量良好。其包括以下各项要求:

①零部件、安全装置、附属装置、仪器仪表完整、质量符合设计要求。

②容器本体整洁,尤其、保温层完整,无严重锈蚀和机械损伤。

③由衬里的容器,衬里完好,无渗漏及鼓包。

④阀门及各类可拆连接部位无跑、冒、滴、漏现象。

⑤基础牢固,支座无严重锈蚀,外管道情况正常。

⑥各类技术资料齐备、准确、有完整的技术档案。

⑦容器在规定期限内进行了定期检验,安全性能良好,并已办理使用登记证。

⑧安全附件检定、校验和更换。

单项选择题
单项选择题

The worst thing about television and radio is that they entertain us, saving us the trouble of entertaining ourselves.

The main idea of this passage is that ______.
A. TV and radio can amuse us with beautiful songs and music
B. TV and radio prevent us from self-entertainment
C. people should sing songs and read books aloud themselves
D. parents should sing songs and read books aloud to their children

A hundred years ago, before all these devices were invented, if a person wanted to entertain himself with a song or a piece of music, he would have to do the singing himself or pick up a violin and play it. Now, all he has to do is turn on the radio or TV. As a result, singing and music have declined.
Italians used to sing all the time. Now, they only do it in Hollywood movies, Indian movies are mostly a series of songs and dances trapped around silly stories. As a result, they don’t do much singing in Indian villages anymore. Indeed, ever since radio first came to life, there has been a terrible decline in amateur (业余的) singing throughout the world.
There are two reasons for this sad decline. One, human beings are astonishingly lazy. Put a lift in a building, and people would rather take it than climb even two flights of steps. Similarly, invent a machine that sings, and people would rather let the machine sing than sing themselves. The other reason is that people are easily embarrassed. When there is a famous, talented musician readily available by pushing a button, which amateur violinist or pianist would want to try to entertain family or friends by himself
These earnest reflections came to me recently when two CDs arrived in the mail. They are historic recordings of famous writers reading their own works. It was thrilling to hear the voices from a long dead past in the late 19th century. But today, reading out loud anything is no longer common. Today, we sing songs to our children until they are about two, we read simple books to them till they are about five, and once they have learnt to read themselves, we become deaf. We’re alive only to the sound of the TV and the stereo (立体声音响).
I count myself extremely lucky to have been born before TV became so common: I was about six before TV appeared. To keep us entertained my mother had to do a good deal of singing and tell us endless tales. It was the same in many other homes. People spoke a language; they sang it, they recited it; it was something they could feel.
Professional actors’ performance is extraordinarily revealing. But I still prefer my own reading, because it’s mine. For the same reason, people find karaoke (卡拉OK) liberating. It is almost the only electronic thing that gives them back their own voice. Even if their voices are hopelessly out of tune, at least it is meaningful self-entertainment.