1【單選題】(2分)Withcarbonequivalent(),thesteelhasalowtendencytohardenandcoldcr□口口口□口口口B2【單選題】(2分)()isnotafactorthatafOjointtype○D3【多選題】(2分)ThecalculationformulaofcarbonequivalentofthelWSconsiderstheinfluenceof()oA.4【單選題】(2分)MaximumcrackdistancehasbeenusedtoallowmoreaccuratedeterminatC5【多選題】(2分)Weldabilityisnoteasilyquantified,andcandependonavarietyoffactors,including().A.第二章測(cè)試1【單選題】(2分)Theweldabilityofhigh-carbonsteelisworsethanthatoflow-carbonsteelbecausehnsteeliswith().□口口口□口口口A2【單選題】(2分)Normally,becauseofauto-tempering,thepostweldmicrostruct□口口口□口口口D3【多選題】(2分)QTLAsteelisnotsusceptibletosolidificationcrackingbecauseitiswith().A.4【多選題】(2分)5【判斷題】(1分)WhenyouweldHTLAsteels,you'dbettertotakeadvantageofauto-teB6【多選題】(2分)Auto-temperingoccursafterweldingwhen7【判斷題】(1分)Beforedesigningweldingprocedure,we'dbettertoanalyzetheweldabiAB18【判斷題】(1分)Toremedytheunderbeadcracking,weneedtoreducecoolingratewhenweweldoil○錯(cuò)○對(duì)AB9【單選題】(2分)Ifthecarboncontentofatypeofsteelis0.○D【判斷題】(1分)A2【判斷題】(1分)PWHTwouldbehelpfultopreventtheformationofwelddecayinaustB3【判斷題】(1分)B4【判斷題】(1分)NopreheatingisrecommendedduringwieldingofduplAA本題解析本題解析5【判斷題】(1分)ThefuncitonofMoissimilartothatofChromiumthattendstostabilizealfa-Fe(bcc)anemperaturecounterpartdelta-Fe(bcc).○錯(cuò)A.A1【單選題】(2分)he().參考答案參考答案B2【單選題】(2分)Themainalloyingelementisfor7xxxalloys().○A.C3【判斷題】(1分)Liquationcrackingandhydrogen-inducedcrackinginthePMZofalumisedbythecombinationofasusceptiblemicrostructureandthepresenceoftensi○錯(cuò)○對(duì)A.B4【判斷題】(1分)Freonhasbeenaddedtotheshieldinggastoreducehydr參考答案參考答案B5【判斷題】(1分)Purealuminumisnotsusceptibletosol對(duì)參考答案參考答案B6參考答案參考答案A7參考答案參考答案A8對(duì)錯(cuò)B9【判斷題】(1分)AfineequiaxeddendriticstructurehasalowersusceptibilitytocrackingthanacoarsecolAB第五章測(cè)試1【單選題】(2分)Generally,thecarboncontentofcastironsisgenerallyi○B(yǎng)2【多選題】(2分)Castironscanbeconvenientlygroupedaccordingtotheirstructure,mechanicdweldability;theyare().A.BB3【單選題】(2分)()isextremelyhardandbrittle,inwhichmuchofthecarboninisretainedinthewithoutgraphiteflak○D4【判斷題】(1分)CastingironswithpearliticmatrixownhigherstrengththanA.A5【判斷題】(1分)MalleableironsaremorereadilyweldA參考答案參考答案B6【判斷題】(1分)Thebrazingweldneedannealingheattreatmen