问题:98%酸凝固点约为-1.1℃,在冬季当气温有可能低于凝固点时,预先采取打循环或酸浓的措施防冻。...
Saturday, November 26, 2022
问题:渣冷器内衬为()A、钢板B、耐酸砖C、耐火砖D、铸石板E、花岗岩...
Sunday, May 7, 2023
问题:一吸塔下塔酸温设计为()A、≤108℃B、≤105℃C、≤102℃D、≤97℃...
Friday, October 20, 2023
问题:总转化率设计值为()A、≥99.5%B、≥99.6%C、≥99.7%D、≥99.8%...
Monday, March 4, 2024
问题:发生全厂停电时,首先关闭各排污阀,再关闭界区主蒸汽阀。...
Thursday, January 18, 2024
Saturday, September 10, 2022
问题:触媒中钒的含量一般为()A、1~5%B、3~7%C、6~10%D、≥10%...
Saturday, November 26, 2022
问题:主风机的额定功率为()A、4400KWB、4400WC、4000KWD、4000W...
Sunday, April 21, 2024
Saturday, September 10, 2022
问题:若需焊接管道,必须释放管道内氢气等易燃气体,办理动火证及专人监护方能施工检修。...
Friday, October 20, 2023
问题:总转化率设计值为()A、≥99.5%B、≥99.6%C、≥99.7%D、≥99.8%...
Monday, March 4, 2024
问题:过筛后的高温段触媒触媒只能用在低温段,而过筛后的低温段触媒触媒不能再用。...
Tuesday, September 19, 2023
Thursday, January 18, 2024
问题:干燥塔下塔酸温设计为()A、≤60℃B、≤65℃C、≤72℃D、≤68℃...
Wednesday, February 21, 2024
问题:新工人、学习、培训人员(一年内复岗位人员除外)上岗需经“三级”安...
Saturday, September 10, 2022
Sunday, February 12, 2023
问题:电尘阳极振打设计为()A、固定不变的间隙式振打B、频率可调的间隙式振打C、连续振打...
Friday, September 29, 2023
问题:锅炉给水泵的型式为()A、卧式离心泵B、立式离心泵C、卧式多级离心泵D、柱塞泵...
Tuesday, September 19, 2023
问题:一吸塔上塔酸温设计为()A、≤70℃B、≤78℃C、≤80℃D、≤84℃...
Saturday, February 24, 2024
问题:电除雾器一送电即出跳闸信号一般情况为()A、阳极管太脏B、阴极线太脏C、绝缘子表面有爬电现场D、阴阳极短路...
Saturday, July 1, 2023