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2018-12-04View Original

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选择题规则：1、每题答案错误，积极参与奖励2财富； 2、答案正确奖励6财富；3、回答奖励每人限一次；4、每个回复限管理评分一次；5、回复后可见答案及答案解释；6、奖励在48小时内有效。学*又拿奖，天天来逛逛关于抽水装置说法正确的是（单选）： A 进水管道一般处于正压，出水管道一般处于负压 B 安装在进水池水面以上的离心泵可以直接启动，无需充水 C 安装在进水池水面以上的离心泵装置，启动前必须充水 D 离心泵必须安装在进水池水面以下答案：C 离心泵可以倒灌也可吸上运行，但是吸上需要灌泵才能启动（自吸泵是另外一种形式的灌泵）

Reply #22018-12-04

C 安装在进水池水面以上的离心泵装置，启动前必须充水

Reply #32018-12-04

C 安装在进水池水面以上的离心泵装置，启动前必须充水

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