问题:填空题乙炔瓶内气体不应全部放完,应留有()的余气。...
Friday, May 12, 2023
问题:单选题夹渣在重要的焊接接头中是()存在的一种缺陷。A 允许B 不允许C 数量不多时允许...
Thursday, October 5, 2023
问题:单选题泵与风机是把机械能转变为液体的()的一种动力设备。A 动能B 压能C 势能D 动能和势能...
Friday, January 12, 2024
问题:单选题锅炉水位低于(),即认为是缺水事故。A 最低安全水位B 水位下极限C 水位表下部可见边缘...
Wednesday, June 14, 2023
问题:管道产生的阻力损失分为()阻力损失和()阻力损失两种。...
Thursday, September 15, 2022
问题:(),焊成的焊缝质量要优于等速送丝式埋弧自动焊机。...
Wednesday, September 21, 2022
Wednesday, November 29, 2023
Friday, January 12, 2024
问题:单选题水泵调速的方法不包括()。A 采用增速齿轮变速B 采用电动机调速C 使用刚性联轴器D 用小汽轮机直接变速驱动...
Monday, December 4, 2023
Thursday, September 22, 2022
问题:锅炉运行中,若安全阀全部失效,但压力表正常,仍可继续运行。()...
Thursday, September 22, 2022
问题:单选题汽包出口的蒸汽是()。A 汽水混合物B 饱和蒸汽C 过热蒸汽D 饱和水...
Friday, May 12, 2023
Saturday, September 17, 2022
Thursday, July 6, 2023
Thursday, September 22, 2022
问题:填空题MZ1-1000型埋弧自动焊机送丝速度增大时则()变大。...
Wednesday, January 10, 2024
Thursday, September 22, 2022
Thursday, September 22, 2022
Wednesday, September 21, 2022
Thursday, September 15, 2022