问题 问答题 简答题

回转式空气预热器转子停转可能是哪些原因造成的?如何处理?

答案

参考答案:

原因:前几级受热面构件脱落卡住转子;径向、周向密封构件脱落范卡;转子受热不均匀造成变形;上、下轴承损坏;传动装置脱扣或损坏;驱动电动机损坏。

处理方法:若属传动装置及驱动电动机故障时,应及时推入备用的传动装置,对故障的装置及时处理,投入备用;其他原因造成的空气预热器停转应停炉处理。

判断题
阅读理解

阅读理解。

     Advice to "sleep on it" could be well founded, scientists say. After a good night's sleep a problem that

couldn't be solved the night before can often appear more manageable, although the evidence until now

has been anecdotal (个人体验的).But researchers at the University of Luebek in Germany have designed

an experiment that shows a good night's sleep can improve insight (顿悟) and problem-solving.

     "If you have some newly-got memories in your brain, sleep acts on these memories' restructures them,

so that after sleep the insight into problem which you could not solve before increases," said Dr Jan Born,

a neuroscientist (神经科学家), at the university. To test the theory, they taught volunteers two simple

rules to help them turn a string of numbers into a new order. There was also a third, hidden rule, which

could help them increase their speed in solving the problem. The researchers divided the volunteers into

two groups: half were allowed to sleep after the training while the rest were forced to stay awake. Dr Jan

Born and his team noticed that the group that had slept after the training were twice as likely to figure out

the third rule as the other group."Sleep helped," Born said in a telephone interview. "The important thing is

that you have to have a memory representation in your brain of the problem you want to solve and then

you sleep, so it can act on the problem." But Born admitted that he and his team don't know how

restructuring of memories occurs or what governs it. Pierre Maquet and Perrine Ruby of the University of

Liege in Belgium said the experimental evidence supports the anecdotal suggestions that sleep can help

develop creative thinking. Although the role of sleep in human creativity will still be a mystery, the research

gives people good reason to fully respect their periods of sleep, they added.

1. The underlined phrase"sleep on it" in Paragraph 1 probably means _____.

A. to delay deciding something until the next day

B. to get as much sleep as possible

C. to go on sleeping without being disturbed

D. to sleep till after the time you usually get up in the morning

2. Jan Born and his team carried out the experiment through _____.

A. comparison

B. interview

C. survey

D. imagination

3. It can be inferred from the passage that ______.

A. people should sleep so long as they have time

B. sleep is the only way to solve hard problems

C. people have various periods of sleep

D. people know how sleep reconstructs memories

4. What would be the best title for the passage?

A. How Sleep Works

B. Sleep Helps Solve Problems

C. No Evidence, But Well Founded

D. Born's Discovery On Sleep