问题 问答题 简答题

当轴流风机润滑油压降低时如何进行处理?

答案

参考答案:

(1)润滑油管故障则按停油泵处理;

(2)检查滤油器进出口压力,若压差超过0.05MPa,则立即切换到备用滤油器运行,并对堵塞的滤油器进行清洗;

(3)若油管阻塞或漏油严重则立即通知检修处理,并注意轴承温度与油压的变化,防止超限,如超限则按超限处理;

(4)用专用内六角扳手调节恒压调节阀使其润滑油压恢复正常。

单项选择题 A1型题
单项选择题

There (1) not one type of reading but several according to your reasons for reading. To read carefully, you have to (2) your reading speed and technique (3) your aim (4) reading. Skimming is a technique necessary for quick and efficient reading.

When skimming, you (5) the reading (6) quickly in order to get the (7) of it, to know how it is organized, (8) an idea of the tone or the intention of the writer. Skimming is (9) an activity which (10) an overall view of the text and (11) a definite reading competence.

Skimming doesn’t need reading all the material, but it doesn’t mean that it is an (12) skill for the lazy, because it need a high degree of alertness and concentration.

When you read, you usually start with (13) understanding and move towards detailed understanding rather than working the other way round. But (14) is also used after you have already carefully studied and you need to (15) the major ideas and concepts.

In order to be able to skim quickly and (16) through a text, you should know where to look for what you want. In preview skimming you read the introductory information, the headings and subheadings, and the summary, if one is provided. (17) this skimming, decide whether to read the material more thoroughly, and select the appropriate speed (18) you read.

The same procedure (19) for preview skimming could also be used to get an overview. Another method would be to read only key words. This is done by omitting the unnecessary words, phrases, and sentences.

In order to skim efficiently and fulfill your purpose, (20) practice is necessary.

12().

A.awful

B.unsuitable

C.ideal

D.wrong