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1、北航《新型建筑材料》在線作業(yè)一（BUAAnewbuildingmaterialsonlinehomework）BUAA"newbuildingmaterials"onlinehomeworkTotalscore:100testtime:-RadioexaminationAmultiple-choicequestionJudgmentquestionRadioexaminationquestions(10questions,40points)1.mixingconcretewiththesamemarkcement,thestrengthofconcrete
2、mainlydependson().A.sandrateB.waterconsumptionC.watercementratioD.stonestrengthFullmarks:42.inthefollowingsteels,thebestplasticityandweldabilityare().A.Q215B.Q255C.Q275D.Q235Fullmarks:43.slagcementandvolcanicashcement,thetwo()different.A.frostresistanceB.hydrationheatC.heatresista
3、nceD.intensitydevelopmentFullmarks:44.whenthefreewaterevaporatesandtheadsorbedwaterisstillsaturated,themoisturecontentofwoodiscalledwood.A.equilibriummoisturecontentB.standardmoisturecontentC.fibersaturationpointD.airdrywatercontentFullmarks:45.wetsand100gwithwatercontentof5%,inwh
4、ichtheweightofwateris()A.5gB.4.76C.5.26D.4Fullmarks:46.prestressedhollowwallboardbelongsto().A.gypsumwallboardB.cementwallC.compositewallboardD.netplasticsandwichpanelFullmarks:47.theageingoflimeinorderto().A.isgoodforcrystallizationB.evaporatesexcessmoistureC.eliminatesthedangero
5、fexcessivelimeD.reducescaloriesFullmarks:4Thestrengthgradeof8.firedcommonbricksisbasedon().A.compressivestrengthandflexuralstrengthB.bigfaceandstripsurfacecompressivestrengthC.compressivestrengthaverageandsingleblockminimumD.compressivestrengthaveragevalueandstrengthstandardvalueF
6、ullmarks:49.whenchoosingthestructuralmaterialunderdynamicload,thefollowingmaterialsshouldbechosen.A.materialswithgoodplasticityB.materialswithgoodtoughnessC.materialwithgoodelasticityD.materialsofgoodhardnessFullmarks:410.modulusofelasticityreflectsthequalityofsteel.A.hardnessB.st
7、rengthC.toughnessD.stiffnessFullmarks:4BUAA"newbuildingmaterials"onlinehomeworkTotalscore:100testtime:-RadioexaminationAmultiple-choicequestionJudgmentquestion,(atotalof8multiple-choicequestions,atotalof32points.)1.thestrengthofconcreteisaffectedbythefollowingfactors.A.slumpB.wate
8、rcementratioC.cementvarietiesD.ce
