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...
Thursday, May 2, 2024
问题:(B-B-009)泵出口安装()阀是为了防止突然停泵,高压液体直...
Monday, September 12, 2022
Monday, October 30, 2023
Saturday, February 3, 2024
Friday, August 25, 2023
问题:泵启动前必须先灌满水成真空,这是由于水的质量比空气约大()倍。A、300B、500C、600D、800...
Tuesday, July 1, 2025
问题:齿轮泵是一种()泵。A、离心B、往复C、容积D、旋涡...
Friday, May 30, 2025
Thursday, September 15, 2022
Friday, May 30, 2025
问题:离心泵叶轮直径发生变化,则()不变。A、扬程B、流量C、轴功率D、效率...
Friday, March 28, 2025
Monday, September 12, 2022
Thursday, September 15, 2022
Thursday, November 2, 2023
问题:煤矿井下远距离控制的额定电压,不得超过()V?A、12VB、36VC、127VD、380V...
Friday, March 28, 2025
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
问题:将净化处理后的水输送到管网,网户或水塔的泵站称为()A、一级泵站B、二级泵站C、加压泵站D、进水泵站...
Tuesday, April 4, 2023
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
问题:离心泵的水头损失包括机械损失、容积损失、水力损失。...
Friday, June 6, 2025
Friday, June 6, 2025
Sunday, March 19, 2023