[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$fCua00w_2sMbJPGLNg7ZRlta1dRv_F-t_sczRqLb0htw":3},{"answer":4,"createTime":5,"id":6,"options":7,"origin":12,"question":19,"related":20,"source":30,"type":31},[],"2024-11-17 23:55:00",166305459,[8,9,10,11],"60 cm2","62 cm2","50 cm2","66.66 cm2",{"count":13,"courseId":14,"courseImg":15,"courseName":16,"workId":17,"workName":18},269,"85b197ab359327921d8087bd54c9580a","https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fa543b16ef3d9cac185499d4a745e356e.jpg","流体力学与液压传动","work_39012476","第十一章 核苷酸代谢","Calculate area of a pipe if, flow rate is 18 L\u002Fmin and flow velocity is 6 cm\u002Fs.( )",[21,32,42,45,55,64,73,82,92,101],{"answer":22,"createTime":5,"id":23,"options":24,"question":29,"source":30,"type":31},[],166305456,[25,26,27,28],"two strokes","none of the above","one stroke","three strokes","How many strokes does a single piston pump need to discharge oil? ( )","v1",0,{"answer":33,"createTime":34,"id":35,"options":36,"question":41,"source":30,"type":31},[],"2024-11-18 18:38:53",166305458,[37,38,39,40],"flow control valve can control both direction and ressure of the oil fow","flow control valve can control the pressure of oil","flow control valve can adjust the flow rate of hydraulic oil","flow control valve changes the direction of oil flow","What is the function of a flow control valve? ( )",{"answer":43,"createTime":5,"id":6,"options":44,"question":19,"source":30,"type":31},[],[8,9,10,11],{"answer":46,"createTime":47,"id":48,"options":49,"question":54,"source":30,"type":31},[],"2024-11-17 23:39:20",166305460,[50,51,52,53],"actuator element","control element","auxiliary element","power element","The energy conversion element for converting pressure energy into mechanical energy for driving working parts is ( )",{"answer":56,"createTime":5,"id":57,"options":58,"question":63,"source":30,"type":31},[],166305461,[59,60,61,62],"the noise is small, the oil delivery is uniform, the volume is small and the weight is light","low cost, reliable work, weak self-priming ability, mostly used in low-pressure system","the method of reducing the oil inlet is usually used to reduce the radial imbalance force","the structure is compact and the flow rate is easy to adjust","The features of external gear pump include ( )",{"answer":65,"createTime":5,"id":66,"options":67,"question":72,"source":30,"type":31},[],166305462,[68,69,70,71],"smooth movement","high efficiency","accurate transmission ratio can be obtained","low machining accuracy required","Compared with mechanical transmission, the advantages of hydraulic transmission include ( )",{"answer":74,"createTime":5,"id":75,"options":76,"question":81,"source":30,"type":31},[],166305463,[77,78,79,80],"radial piston pump","axial piston pump","double acting vane pump","single acting vane pump","Which pump can't be used as a variable displacement pump ( )",{"answer":83,"createTime":84,"id":85,"options":86,"question":91,"source":30,"type":31},[],"2024-11-18 18:38:12",166305464,[87,88,89,90],"1 and 2","1, 2 and 4","2, 3 and 4","1, 2 and 3","Which of the following statements are true? ( ) 1. low viscosity fluids have higher leakage 2. high viscosity fluids have high pressure drop3. low viscosity fluids consume more power4. low viscosity leads to wear of components",{"answer":93,"createTime":5,"id":94,"options":95,"question":100,"source":30,"type":31},[],166305465,[96,97,98,99],"variable flow rate can be achieved","piston displacement cannot be varied","all the above","fixed flow rate can be achieved","In a bent-axis piston pump, what happens when the angle between the drive shaft and the cylinder block is varied? ( )",{"answer":102,"createTime":84,"id":103,"options":104,"question":109,"source":30,"type":31},[],166305466,[105,106,107,108],"Sequential action circuit controlled by sequence valve","Sequential action circuit controlled by stroke switch","Sequential action circuit controlled by stroke valve","Sequential action circuit controlled by pressure relay","In a hydraulic circuit, the operating sequence needs to be changed frequently, what type of circuit should be adopted? ( )"]