水泵的特性曲线是在额定转速下,表示流量与扬程、()、()、及允许吸上真空高度,之间相互关系的曲线。...
Thursday, September 22, 2022
判断题蝶阀不能调节流量,不能用于高温高压场合。A 对B 错...
Thursday, May 9, 2024
单选题在劳动过程中,工业毒物引起的中毒叫()。A 工伤B 职业中毒C 劳动伤害D 致敏性...
Sunday, June 25, 2023
根据水泵的Q——H曲线,对不同的流量应有不同的能量头。...
Wednesday, September 14, 2022
凸缘联轴器易于对中,可传递较大扭矩,广泛用于载荷()的联接中。...
Thursday, September 22, 2022
单选题齿轮泵内有(),所以存在串漏问题。A 闭死容积B 卸荷槽C 卸荷孔D 高、低压腔...
Friday, March 3, 2023
单选题属于其它类型的水泵的是()A 气升泵B 螺杆泵C 凸轮泵D 轴流泵...
Sunday, December 10, 2023
Friday, September 16, 2022
单选题螺杆泵是一种()泵。A 离心B 齿轮C 柱塞D 容积...
Friday, April 7, 2023
泵80IYⅡ-80与80IYⅡ-802相比,后者扬程高于前者。...
Thursday, September 22, 2022
Thursday, September 22, 2022
Wednesday, September 14, 2022
单选题属于化工生产中常用测温的方法是()。A 用水银温度计B 热电偶C 体温计D 红外测温仪...
Wednesday, May 8, 2024
Thursday, September 22, 2022
Sunday, September 18, 2022
填空题电开闸操作时,当需开闸或关闸时,如需反方向关或开时,一定要()后,再行开或关。...
Monday, October 23, 2023
Thursday, September 22, 2022
Thursday, September 22, 2022
Thursday, September 22, 2022
Sunday, March 24, 2024