Thursday, September 15, 2022
问题:水泵在1500~3000转/分时,泵的径向振幅不超过()。...
Tuesday, July 30, 2024
问题:离心泵扬程单位是()。A、米B、米液柱C、兆帕D、米3/小时...
Thursday, April 24, 2025
问题:一般情况下,加工轴承衬多用青铜,因青铜承受载荷能力大,耐磨性能、导热性都比较好。...
Monday, May 8, 2023
Tuesday, March 21, 2023
Sunday, December 1, 2024
问题:离心泵启泵前盘车是为()。A、防止泵轴弯曲B、防止机封泄漏C、检查各部件安装情况D、预热均匀...
Saturday, May 11, 2024
Thursday, September 15, 2022
Thursday, September 15, 2022
问题:通常情况下,多级泵的()是对称安装的,以消除轴向力。A、口环B、叶轮C、轴承D、隔板...
Saturday, November 9, 2024
Thursday, September 15, 2022
Wednesday, December 25, 2024
问题:当电压在10KW以下,高压供电和低压电力用户的电压变化,不得超过...
Thursday, September 15, 2022
问题:机封按补偿机构的弹簧数可分为多弹簧和单弹簧式机械密封。...
Monday, February 17, 2025
Thursday, September 15, 2022
问题:计算题:(B-A-003)已知某泵的叶轮直径为D<sub>1<...
Thursday, September 15, 2022
问题:水泵串联可以增加扬程,串联理想条件是参加串联的各台水泵流量要相互接近。...
Wednesday, November 15, 2023
问题:在自动控制流程图中,温度、压力、流量分别用()表示。...
Thursday, September 15, 2022
问题:蒸汽往复泵单向阀有敲击声,说明()。A、弹簧紧了或断了B、弹簧卡死C、无弹簧D、排气不均匀...
Friday, August 25, 2023