[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$fSRzMA6965vQkBa3ZaP4YpQSTmB4YaizCJY9-gMcY7Kw":3},{"answer":4,"createTime":5,"id":6,"options":7,"origin":12,"question":19,"related":20,"source":30,"type":31},[],"2024-01-16 13:15:13",131384042,[8,9,10,11],"高转速、大直径","高转速、小直径","低转速、大直径","低转速、小直径",{"count":13,"courseId":14,"courseImg":15,"courseName":16,"workId":17,"workName":18},25,"140db8b5783d645bc20688188fffd6f6","https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Faf96f081684d672304139fac4f4da470.jpg","化工原理","exam_104954225","非均相混合物分离(沉降和过滤)随堂测试","为使离心机有较大的分离因数和保证转鼓有关足够的机械强度,应采用( )的转鼓",[21,32,41,50,59,68,77,86,95,104],{"answer":22,"createTime":5,"id":23,"options":24,"question":29,"source":30,"type":31},[],131384024,[25,26,27,28],"增大","减小","不变","先增大后减小","含固体颗粒的气体通过降尘室进行除尘,当操作温度升高时,沉降速度会( )","v1",0,{"answer":33,"createTime":5,"id":34,"options":35,"question":40,"source":30,"type":31},[],131384029,[36,37,38,39],"冷却后进行","加热后进行","不必换热,马上进行分离","加热、冷却均可","颗粒的重力沉降在斯托克斯区域时,含尘气体质量流量不变,除尘效果以( )为好",{"answer":42,"createTime":5,"id":43,"options":44,"question":49,"source":30,"type":31},[],131384030,[45,46,47,48],"1","2","0.5","0.25","在斯托克斯区,颗粒的沉降速度与颗粒直径的( )次方成正比",{"answer":51,"createTime":5,"id":52,"options":53,"question":58,"source":30,"type":31},[],131384032,[54,55,56,57],"颗粒密度","空气黏度","颗粒直径","空气密度","当固体微粒在大气中沉降是斯托克斯区域时,以( )的大小对沉降速度的影响最为显著",{"answer":60,"createTime":5,"id":61,"options":62,"question":67,"source":30,"type":31},[],131384033,[63,64,65,66],"75","100","70.7","82","含微小颗粒的气流在降尘室内除去小颗粒(斯托克斯区),100%可除去的最小颗粒为50μm的粒子,现在气体流量qV增大一倍,则此时能100%除去的最小粒径为( )μm",{"answer":69,"createTime":5,"id":70,"options":71,"question":76,"source":30,"type":31},[],131384035,[72,73,74,75],"53.2","43.3","38.7","75.6","某重力降尘室气体均布(斯托克斯区).已知理论上能100%除下粒径为50μm,则75%能除去粒径为( )μm. 某颗粒的除去效率(百分比)= ut \u002F ut,min =( dp \u002F dp,min)2 A、53.2; B、43.3; C、38.7; D、75.6",{"answer":78,"createTime":5,"id":79,"options":80,"question":85,"source":30,"type":31},[],131384036,[81,82,83,84],"提高降尘室的高度","延长沉降时间","增大沉降面积","缩短停留时间","欲提高降尘室的生产能力,主要的措施是( )",{"answer":87,"createTime":5,"id":88,"options":89,"question":94,"source":30,"type":31},[],131384038,[90,91,92,93],"临界粒径增大,分离效率下降","临界粒径增大,分离效率提高","临界粒径减小,分离效率提高","临界粒径减小,分离效率下降","对标准旋风分离器,将其直径减小时,会导致( )",{"answer":96,"createTime":5,"id":97,"options":98,"question":103,"source":30,"type":31},[],131384040,[99,100,101,102],"10","204","51","41","颗粒在离心力场内作圆周运动时,其旋转半径为0.2m时,切线速度为10m\u002Fs,其分离因数为( )",{"answer":105,"createTime":5,"id":6,"options":106,"question":19,"source":30,"type":31},[],[8,9,10,11]]