问题:离心泵的流量.扬程.效率与被输送的介质粘度无关。...
Wednesday, May 24, 2023
Saturday, December 3, 2022
Saturday, December 3, 2022
问题:离心泵机械密封泄漏率要求重质油不超过()滴/分。A、30B、20C、10D、5...
Friday, July 28, 2023
问题:硫化氢对铁的腐蚀为()反应, 其阴极反应方程式为2H++2e→2H→H2↑。...
Tuesday, December 12, 2023
问题:在汽液相平衡状态下,液面上蒸汽所具有的压力称为该温度下的(),简称()。...
Sunday, August 13, 2023
Saturday, December 3, 2022
问题:当输送非粘性介质时,泵所需的汽蚀余量()。A、增大B、减小C、不变...
Wednesday, June 7, 2023
问题:为防止泵抽空,要从设计,(), 制造三个方面着手。...
Thursday, September 15, 2022
问题:氨溶解于水中,其溶液呈()性。A、酸性B、中性C、碱性...
Friday, November 11, 2022
Wednesday, September 6, 2023
问题:装置内用火焊接管道时,只要把管内介质放干净就可以动火。...
Friday, October 6, 2023
Friday, April 28, 2023
Saturday, December 3, 2022
Tuesday, September 13, 2022
Friday, October 6, 2023
问题:含硫污水能电离成(),能互相起()反应和()反应。...
Sunday, December 25, 2022
问题:含硫污水-净化水换热器内漏可能会影响净化水产品质量不合格。...
Thursday, November 9, 2023
Tuesday, September 13, 2022
问题:经预处理后的污水是用()加压后进人塔C01001的。...
Saturday, August 19, 2023