问题 问答题 简答题

潜水泵或排污泵的维护保养如何进行?

答案

参考答案:

①用500V摇表检测潜水泵或潜污泵绝缘电阻是否在0.25MΩ以上,否则应拆开潜水泵或排污泵,对线圈进行烘干处理;

②检查密封圈是否已老化,如已老化则应更换;

③检查轴承磨损情况,如转动时有明显的异常声响或有阻滞现象,则应更换同型号同规格的轴承;④清洁潜水泵、排污泵外壳,如锈蚀严重则应在表面处理后重新油漆一遍;

⑤检查潜水泵、排污泵上所连接管是否牢固,如松弛、漏水则应紧固或更换胶垫。

⑥拧紧潜水泵、排污泵上的所有螺母。

句型转换

同义句转换,注意to 和for的用法,每空一词。

1. My friend gave me a new pen yesterday.

    My friends gave                                                                yesterday.

2. Please show me your new watch.

    Please show                                                   me.

3. He will pass the child a new ball.

    He will pass                                                   the child.

4. My sister make every day.

    My sister make                                      every week.

5. The teacher is singing an English song for his students.

    The teacher is singing                         an English song.

6. Who can find me the pen?

    Who can find the pen             me?

7. Zhang Hua lent his bike to me yesterday.

    Zhang Hua lent                                      yesterday.

8. Now please hand me the flowers.

    Please hand the flowers                         now.

9. We show our homework to our teacher everyday.

    Everyday we show our                                     .

10. He brought his mother a new coat just now.

      He brought a                                                                just now.

填空题