大工秋《建筑材料》在线作业-（big work autumn building materials online homework -）

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1、大工10秋《建筑材料》在线作业1-3（Bigwork10autumnbuildingmaterialsonlinehomework1-3）Bigwork10autumn"buildingmaterials"onlinehomework1Thetotalscoreofthetestpaper:100testtime:testscore:100JudgmentquestionsRadioexaminationAmultiple-choicequestionAtotalof13questions(52points)Score:521.buil

2、dingmaterialsoftenuseporosityastheindexofcompactness,andthevalueistheratioofthevolumeofopeningstothevolumeofmaterials.A.errorB.correctThecorrectanswer:AFullScore:4points:42.theapparentdensityofmaterialsreferstotheweightoftheunitvolumeintheabsolutedensestate.A.errorB.corr

3、ectThecorrectanswer:AFullScore:4points:43.rigidcementitiousmaterialisnotonlysuitableforthedryingenvironmentontheground,butalsosuitableforhumidenvironment.A.errorB.correctThecorrectanswer:AFullScore:4points:4Thetoughnessofthe4.materialisexpressedbytheenergyrequiredforthem

4、aterialtobedestroyedunderimpactorvibrationload,andistestedbyimpacttest.A.errorB.correctThecorrectanswer:BFullScore:4points:45.limehydrationrateisfaster,canacceleratetheproductionspeedoflimeproducts.A.errorB.correctThecorrectanswer:AFullScore:4points:46.limeisakindofrigid

5、cementitiousmaterial,andgypsumisakindofrigidcementitiousmaterial.A.errorB.correctThecorrectanswer:AFullScore:4points:47.gypsumhydrationreferstotheprocessofhemihydrategypsumaddingwatertoproducetwowatergypsum.A.errorB.correctThecorrectanswer:BFullScore:4points:48.gypsumsho

6、uldnotbeusedintheexternalwall.A.errorB.correctThecorrectanswer:BFullScore:4points:49.thebulkdensityofcrushedstoneisgenerallylessthanitsapparentdensity.A.errorB.correctThecorrectanswer:BFullScore:4points:410.limeripeningisanendothermicreactionaccompaniedbyvolumeexpansion.

7、A.errorB.correctThecorrectanswer:AFullScore:4points:411.thepresenceofexcessivelimeduringlimeproductioncanaffectthequalityoflimeproducts.A.errorB.correctThecorrectanswer:BFullScore:4points:412.concretebelongstobrittlematerial.A.errorB.correctThecorrectanswer:BFullScore:4p

8、oints:4Thesmallerthesofteningcoefficientis,thebetterthewaterresistanceofthe13.materialis.A.errorB.corre