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[":;"일일 한 문제 泵设备" 선택 문제: 1

2018-12-07View Original

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本帖最后由 3983596_FPPZ 于 2018-12-7 08:49 编辑 bk15.jpg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 其他条件不变,当泵输送介质比重减小时,下列说法正确的是( ) (多选) A 流量不变 B扬程不变 C轴功率变小 D出口压力不变 E 流量变小 F轴功率不变 G泵汽蚀余量变小 H 扬程变小 I 出口压力变小 J泵汽蚀余量不变 答案:A B C I J 这是考核泵基本概念的题:流量、扬程、汽蚀余量是泵本身的固有参数,不因工况和介质变化而变化, 随比重变化的只有出口压力和轴功率:lol

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