[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$fqloBnS72_RnX32paEh_wZuxHXr_BQjqWVnyHC-MTow8":3},{"answer":4,"createTime":5,"id":6,"options":7,"origin":12,"question":19,"related":20,"source":30,"type":31},[],"2024-04-22 11:25:47",139483666,[8,9,10,11],"4倍","1倍","0.5倍","2倍",{"count":13,"courseId":14,"courseImg":15,"courseName":16,"workId":17,"workName":18},9,"ca5a4f53f5a938e757abf8e6bcc11d04","https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Ff7267fee2d95b48dc09ba636317a0b14.jpg","化工基础","work_34424893","新建作业20240420(传热)","在某一传热过程中,热流给定,若传热系数增加1倍,冷热流体间的温差将是原来的多少倍? ( )",[21,32,41,51,60,63,72,81,90],{"answer":22,"createTime":5,"id":23,"options":24,"question":29,"source":30,"type":31},[],139483662,[25,26,27,28],"利用多管程结构","增大管径","冷凝时在管壁上开一些纵槽","在壳程内装折流挡板","下列不能提高对流传热膜系数的是( )","v1",0,{"answer":33,"createTime":5,"id":34,"options":35,"question":40,"source":30,"type":31},[],139483663,[36,37,38,39],"虚拟膜层","缓冲层","湍流主体","层流内层","对流给热热阻主要集中在( )",{"answer":42,"createTime":43,"id":44,"options":45,"question":50,"source":30,"type":31},[],"2024-04-21 17:14:32",139483664,[46,47,48,49],"从凝结水蒸气到水传热","从油到水传热","从气体到水传热","从气体到气体传热","试判断下述几种传热过程中哪一种的传热系数最小",{"answer":52,"createTime":5,"id":53,"options":54,"question":59,"source":30,"type":31},[],139483665,[55,56,57,58],"1\u002F78m·K\u002FW","1\u002F78m2·K\u002FW","78W\u002F(m·K)","78W\u002F(m2·K)","若已知对流传热系数为78W\u002F(m2.K),则其单位面积对流传热热阻为多少",{"answer":61,"createTime":5,"id":6,"options":62,"question":19,"source":30,"type":31},[],[8,9,10,11],{"answer":64,"createTime":5,"id":65,"options":66,"question":71,"source":30,"type":31},[],139483667,[67,68,69,70],"39.9℃,44.8℃","44.8℃,39.9℃","42.5℃,40.0℃","45.0℃,45.0℃","有一板式传热器,热流体进口温度80℃、出口温度50℃,冷流体进口温度10℃、出口温度30℃,则顺流布置时和逆流布置时的对数平均温差分别为多少? ( )",{"answer":73,"createTime":5,"id":74,"options":75,"question":80,"source":30,"type":31},[],139483668,[76,77,78,79],"λ1>λ2>λ3","λ2>λ3>λ1","λ2<λ3<λ1","λ1<λ2<λ3","空气、水、金属固体的导热系数分别为λ1、λ2、λ3,其大小顺序正确的是()",{"answer":82,"createTime":5,"id":83,"options":84,"question":89,"source":30,"type":31},[],139483669,[85,86,87,88],"核状沸腾区","过渡区","自然对流区","膜状沸腾区","工业生产中,沸腾传热应设法保持在()",{"answer":91,"createTime":5,"id":92,"options":93,"question":98,"source":30,"type":31},[],139483670,[94,95,96,97],"格拉晓夫数","雷诺数","努塞尔数","普朗特数","下列哪个准则数反映了流体物性对对流换热的影响 ?( )"]