问题
问答题 简答题
离心泵电流超高有哪些原因？
答案
参考答案：
（1）填料压盖太紧。
（2）泵的口环损坏。
（3）叶轮与泵体间可能有间隙。
（4）泵轴与电机不同心，运转不平稳。
（5）润滑油不好，形成干摩擦。
（6）液体比重或粘度大。
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离心泵电流超高有哪些原因？
参考答案：
（1）填料压盖太紧。
（2）泵的口环损坏。
（3）叶轮与泵体间可能有间隙。
（4）泵轴与电机不同心，运转不平稳。
（5）润滑油不好，形成干摩擦。
（6）液体比重或粘度大。
| 完形填空。 | |||
| Carlos is a new student. He is __1__ Peru.This is his __2__ day at his new scnool. He takes the bus with David every day. Carlos __3__ David are good friends. David __4__ Carlos with his English, and Carlos teaches David how to play soccer. Carlos is a __5__ fan (迷). He loves sports very much. On Saturday afternoons, he often goes swimming. Carlos also likes playing volleyball and baseball, but he __6__ play them well. His __7__ sport is soccer. He plays soccer for a(n) __8__ every day. David likes __9__. He thinks it is __10__. He can play the guitar and the piano very weIl. He wants to play the piano at Carlos' birthday party. | |||
| ( ) l. A. on ( ) 2. A. five ( ) 3. A. and ( ) 4. A. knows ( ) 5. A. music ( ) 6. A. can ( ) 7. A. favorite ( ) 8. A. day ( ) 9. A. music ( ) 10. A. scary | B. from B. fifty B. or B. sees B. sports B. isn't B. new B. hour B. math B. sad | C. for C. fifth C. but C. helps C. movie C. doesn't C. next C. month C. history C. fun | |