Friday, September 16, 2022
Saturday, December 3, 2022
问题:氨和硫化氢在水中的溶解度随温度的升高而(),随压力的升高而()。...
Tuesday, September 13, 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: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
Saturday, December 3, 2022
Thursday, February 2, 2023
Saturday, December 3, 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
问题:经预处理后的污水是用()加压后进人塔C01001的。...
Saturday, August 19, 2023
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
Tuesday, September 13, 2022
Saturday, March 4, 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:泵启动后其压力表指示应在()范围内,否则要调节好。A、最大量程B、2/3量程C、红线量程...
Sunday, May 21, 2023
Tuesday, September 13, 2022
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:凡在2米以上的高处进行的有可能坠落的作业均称为高处作业。...
Saturday, March 4, 2023
问题:当蒸汽压力不变,但塔底加热蒸汽量却逐渐减小或回零,可能是由于塔底液位偏低或为零所造成的。...
Wednesday, October 26, 2022
Friday, October 6, 2023