问题 问答题 简答题

汽轮机润滑油系统投运后如何检查?

答案

参考答案:

汽轮机润滑油系统投运后应作检查:

(1)汽轮机各轴承润滑油压、回油情况是否正常,轴承箱盖结合面、油档是否漏油;

(2)润滑油管道、法兰、阀门是否漏油;

(3)热工信号油管道、变送器、测点与轴瓦及油管道的接触处是否漏油;

(4)油系统的放油门是否有内漏或误开而造成集油箱、污油箱的油位升高;

(5)主油箱油位的变化情况以及主油箱内油滤网前后落差是否正常,主油箱上的排油烟风机已投运;

(6)集控CRT画面显示的润滑油压与就地表计相符;

(7)开启盘车供油门,检查盘车装置无漏油处。

单项选择题
阅读理解

Digital Trend: BOOKLESS LIBRARIES

What if you could fit all of a library’s collection in the palm of your hand? That’s part of the idea behind an upcoming bookless public library in San Antonio. Called Biblio Tech, the system will lend out e-readers loaded with 10,000 titles for two-to-three –week periods. But don't bother holding on to the device longer than that because it’s programmed to go dead.

Other libraries have tried similar programs: In 2002, the Santa Rosa Branch Library in Tucson, Arizona, launched a digital-only facility, and a bookless project was proposed last year in Newport Beach, California. Those digital-only projects folded—residents wanted their paperbacks—but Stanford University maintains a successful bookless engineering library with over 65,000 titles. Officials say digital libraries are a low-cost way to educate the masses and argue their rise is inevitable.

Still, some insist print isn’t doomed. A recent Wall Street Journal article notes that e-book purchases skew(倾斜)heavily toward the sort of  “light entertainment” novels you can pick up at the grocery store. A survey from the Pew Research Center shows that about 90 percent of digital readers still crack open physical books.( After all, there are only four Twilight books. How hard is it to drag those around?)

小题1:From the first paragraph, we can tell _____.

A.you can always keep all of the books in your hands,

B.Biblio Tech will lend readers 10,000 books temporarily.

C.the books will not be stored in your device forever.

D.the bookless public library can be found in San Antonio now.小题2:The following statements are true except that _____.

A.the Santa Rosa Branch Library lend out e-readers with 10,000 books.

B.the physical books are still popular despite those bookless projects.

C.Stanford University sets a successful example of bookless engineering.

D.some officials agree that digital libraries are educative and unavoidable.小题3:What is the meaning of the underlined word in paragraph 2?

A.succeeded

B.opened

C.accepted

D.failed小题4:Some people insist that print will not disappear because _____.

A.e-books are mainly sort of “light entertainment” novels.

B.most of the digital readers prefer books about physics.

C.a majority of e-reader users still choose to read paperbacks.

D.it is easy to take 4 Twilight books everywhere.