问题:水泵的变化规律是,流量与叶轮直径成正比,扬程与叶轮直径的平方成正...
Thursday, September 15, 2022
问题:电流所经过的路径称为()A、短路B、断路C、电路D、电源...
Saturday, December 23, 2023
Saturday, February 3, 2024
Saturday, December 23, 2023
问题:对于同一流体来说,滞流与()并存。A、湍流B、浊流C、层流D、静止...
Monday, November 6, 2023
问题:对于同一台离心泵,流量增加则()。A、轴功率降低B、扬程降低C、效率降低D、转数一定变化...
Saturday, December 24, 2022
问题:离心泵的水头损失包括机械损失、容积损失、水力损失。...
Wednesday, March 8, 2023
问题:填料密封是由()和轴的表面紧密接触来实现密封的。A、填料B、动环C、静环D、叶轮...
Sunday, March 19, 2023
问题:离心泵联轴器分为()。A、可移式联轴器,钢性可移式联轴器B、弹性圈柱销式联轴器,可移式联轴器C、固定式联轴器,可移式联轴器D、尼龙柱销式联轴器,弹性圈柱销式联轴器...
Friday, March 29, 2024
Saturday, December 23, 2023
问题:对于纯物质,外压一定,当加热到某一温度时,其饱合蒸汽压等于外界压力,此时汽液界面和液体内部同时出现汽化现象,这一温度即()。A、露点B、泡点C、沸点D、闪点...
Tuesday, March 21, 2023
问题:离心泵的重要部件是()。A、泵体B、密封C、叶轮D、平衡装置...
Friday, March 31, 2023
Monday, October 30, 2023
Friday, March 31, 2023
问题:发生人身触电事故后,人工呼吸的方法有口对口吹气法;心脏挤压法。...
Thursday, September 15, 2022
Monday, September 26, 2022
Tuesday, March 21, 2023
Monday, November 6, 2023
Thursday, September 15, 2022
Thursday, September 15, 2022