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2017-12-09View Original

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参与：奖5财富；回答正确：奖10财富；注：此贴有效时间48小时。单选题：电机驱动的离心泵启动前出口阀应关闭，其目的是（）。A.防止液体倒流 B.防止启动后流体对调节阀的冲击 C.防止泵启动时因电机电流过高而烧坏电机 D.保护泵体答案： C 动动手指参与进来，大家学到知识才是我们最终目的。送人玫瑰，手留余香。https://bbs.hcbbs.com/static/image/hrline/1.gif https://bbs.hcbbs.com/static/image/hrline/2.gif 注：两天后答案自动公布。 “我的装置我的家“ 大型原创照片分享活动（第二期） https://bbs.hcbbs.com/forum.php?mod=viewthread&tid=1868167&extra=page%3D1 【一问一答】催化焦化重整油品调和版2017年汇总贴 https://bbs.hcbbs.com/thread-1826018-1-1.html 【每日一题】催化焦化重整油品调和版2017年汇总贴 https://bbs.hcbbs.com/thread-1811219-1-1.html

Reply #22017-12-09

C.防止泵启动时因电机电流过高而烧坏电机

Reply #32017-12-09

C.防止泵启动时因电机电流过高而烧坏电机

Reply #42017-12-09

C.防止泵启动时因电机电流过高而烧坏电机

Reply #52017-12-09

C.防止泵启动时因电机电流过高而烧坏电机

Reply #62017-12-09

C.防止泵启动时因电机电流过高而烧坏电机

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