资源描述：
《西交《机械设计基础》在线作业（west turn mechanical design foundation online homework）》由会员上传分享，免费在线阅读，更多相关内容在教育资源-天天文库。
1、西交《机械设计基础》在线作业（Westturnmechanicaldesignfoundationonlinehomework）Westturn"mechanicaldesignfoundation"onlinehomeworkTotalscore:100testtime:-RadioexaminationAmultiple-choicequestionJudgmentquestionRadioexaminationquestions(20questions,40points)Thenumberofdegreesoffreedomin1.planarmechanismsi
2、satmost.A.oneB.twoC.threeD.fourFullmarks:22.,thebasicratedlifeofaballbearingis36kN,thebasicratedlifeis729thousandrpm,themaximumequivalentdynamicloadthatthebearingcanbearis()kN.A.30B.35C.40D.45Fullmarks:2Themainformoffailureofthe3.pinconnectionis().A.shearandcrushingB.twistdeformationC.ben
3、dingfractureD.gluingFullmarks:2The4.()measurescannotimprovetherigidityoftheshaft.A.useshighstrengthalloysteelB.changesthesupportingpositionoftheshaftC.changesthediameteroftheshaftD.iswrongFullmarks:25.,thefreedomoftwoplanarmechanismsisequalto1,andnowtheyarestrungintoaplanarmechanismbyamov
4、ingelementwithtwohinges,andthedegreeoffreedomisequalto().A.0B.1C.2D.3Fullmarks:26.fortheclosedhardtoothedsurfacegeardrive,itisbettertotakefewerteethandincreasethemodulus,thepurposeis().A.toimprovethecontactstrengthoftoothsurfaceB.reducestheslipcoefficientandimprovesthetransmissionefficien
5、cyC.ensuresthebendingstrengthofthegearteethD.iswrongFullmarks:27.inmechanicaltransmission,theinstantaneoustransmissionconstantistheoreticallyguaranteed.A.beltdriveB.chaindriveC.geardrive,#VbeltdriveFullmarks:2Thefailuremodeofthe8.wormgearissimilartothatofthegeardrive,amongwhichthemostpron
6、etooccur.PittingcorrosionandwearofA.B.bondingandwearFractureandplasticdeformationofC.gearD.iswrongFullmarks:29.inwormgear,otherconditionsarethesame.Ifthenumberofwormheadsisincreased,(.TheA.transmissionefficiencyisimproved,andtheslipspeedisreducedTheB.transmissionefficiencyisreducedandthes
7、lidingspeedisincreasedC.transmissionefficiencyandslidingspeedareimprovedD.transmissionefficiencyandslidingspeedarebothreducedFullmarks:210.commonlyusedthreadshapesaretriangular,rectangular,trapezoidalandzigzag,whereintheteethusedforconnectingandfortransmissionare().
