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[". 一周时间真的过过,春节前的最后一贴 春节快乐!

2019-02-03View Original

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bg2.png周一(2019.1.28)https://bbs.hcbbs.com/thread-2277093-1-1.html 1、常见的三相鼠笼异步电机可以作为变频电机使用(错) 2、金属腐蚀是个化学反应过程(对) 周二(2019.1.29)https://bbs.hcbbs.com/thread-2278851-1-1.html 1、调节阀可以允许少量的内漏(对) 2、离心泵出口背压的升高一定会导致轴功率增大(错) 周三(2019.1.30)https://bbs.hcbbs.com/thread-2279752-1-1.html 1、射流泵不属于离心泵,也不属于容积泵(对) 2、离心泵性能曲线中有“驼峰”,是泵本身的因素导致,也是工况条件的作用影响(错) 周四(2019.1.31)https://bbs.hcbbs.com/thread-2280990-1-1.html 1、《GB/T 29531-2013 泵的振动测量与评价方法》标准中,评价泵的振动级别分类的依据 是泵中心高度和泵转速(对) 2、离心泵的汽蚀比转速越大,泵汽蚀余量越小,泵抗汽蚀能力越强(对) 周五(2019.2.1)https://bbs.hcbbs.com/thread-2282116-1-1.html 1、相同尺寸的滚子轴承比球轴承 极限转速高,载荷大(错) 2、在开放系统中,相同的离心泵,在低海拔地区使用比在高海拔地区使用,更不易发生汽蚀。(对) 周六(2019.2.2)https://bbs.hcbbs.com/thread-2282632-1-1.html 1、磁力泵的振动值超差可能由于汽蚀余量不合格导致。(对) 2、振动分析时,频谱图中横坐标是转速,纵坐标是幅值。(错) 每日一题 春节前的最后一贴 春节快乐!
Reply #22019-02-03
一周时间真的过的好快,转眼即到。新年快乐,新思想,新创新,新突破。

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