问题 问答题 简答题

循泵正常运行中的检查项目?

答案

参考答案:

a.定期检查泵和电机各部的声音和振动;

b.定期检查泵出水压力正常;c.定期检查泵和电机推力轴承金属温度正常,电机轴承油位正常。d.定期检查泵电机电流正常,电机线圈温度正常;

e.定期检查轴承冷却水流量正常;f.循泵出口蝶阀液压油站油温、油位、油压正常.

g.检查清污机前后液位差大于

300mm时,清污机自动运行正常。h.检查循泵坑排污泵联锁正常,泵坑内无积水。

i.检查高低位油箱油位正常。

单项选择题

The field of medicine has always attracted its share of quacks and charlatans — disreputable women and men with little or no medical knowledge who promise quick cures at cheap prices. The reasons why quackery thrives even in modern times are easy to find.To begin with, pain seems to be a chronic human condition. A person whose body or mind "hurts" will often pay any amount of money for the promise of relief. Second, even the best medical treatment cannot cure all the ills that beset men and women. People who mistrust or dislike the truths that their physicians tell them often turn to more sympathetic ears.Many people lack the training necessary to evaluate medical claims. Given the choice between (a) a reputable physician who says a cure for cancer will be long, expensive and may not work at all, and (b) a salesperson who says that several bottles of a secret formula "snake oil" will cure not only cancer but tuberculosis as well, some individuals will opt for "snake oil".Many "snake oil" remedies are highly laced with alcohol or narcotic drugs. Anyone who drinks them may get so drunk or stoned that they drown their pains in the rising tide of pleasant intoxication. Little wonder that "snake oil" is a popular cure-all for minor aches and hurts! But let there be no misunderstandings. A very few "home remedies" actually work. However, most remedies sold by quacks are not only useless, but often can be harmful as well.

Many individuals opt for "snake oil" because they________.

A.are misled by a secret formula

B.cannot afford a treatment

C.lack medical knowledge

D.do not trust physicians

单项选择题