第1页共47页编号：时间：2021年x月x日书山有路勤为径，学海无涯苦作舟页码：第1页共47页CSWIP3.1(WELDINGINSPECTOR)MULTIPLECHOICEQUESTIONS01.When“H2control”isspecifiedforamanualmetalarcweldingproject,theelectrodewouldnormallybe:(a)Cellulose(b)Ironoxide(c)Acid(d)Basic02.Youwouldwithcertaintyrecognizeahydrogencontrolledfluxcoveredelectrodefromits:(a)Colour(b)Length(c)TradeName(d)AWS/BS639CodeLetter03.Whenmanualmetalarcweldingisbeingcarriedoutonanopenconstructionsite,whichgroupofweldersarethemostlikelytorequirecontinuousmonitoring?(a)Concreteshutteringweldingteams(b)Pipeweldingteam(c)Platerwelders(d)Plantmaintenancewelders04.Younoticemanualmetalarcelectrodes,strippedofflux,arebeingusedasfillerwireforTIGwelding.Youwouldobjectbecause:(a)Itistooexpensive(b)Thewirewouldbetoothick(c)Theweldmetalcompositionmaybewrong(d)Thewireistooshort05.Whenopensiteworking,seriousporosityinmetalarcweldsisbroughttoyourattention.Whatwouldyouinvestigate:(a)Electrodetype(b)Powerplanttype(c)Electrodestorage(d)Daytemperature06.Thesteelcompositioninastructuralcontractischangedform0.15%carbon,0.6%manganeseto0.2%carbon,1.2%manganese.Mightthisinfluencetheincidenceof:(a)Porosity(b)Crackingintheweldarea(c)Undercutforfilletwelds(d)Lackofrootfusiondefects第2页共47页第1页共47页编号：时间：2021年x月x日书山有路勤为径，学海无涯苦作舟页码：第2页共47页07.Oneofthefollowingalloysisnon-magnetic.Which?(a)4%ChromiumMolybdenum(b)12%Chromium(c)AusteniticStainlessSteel(d)9%NickleSteel08.WhenTIGweldingAusteniticStainlessSteelpipe,Argongasbakingiscalledfor.Thisisto:(a)Preventoxidation(b)Preventunderbeadcracking(c)Preventporosity(d)Controlthepenetrationbeadshape09.Pre-heatingacarbonsteelmanualmetalarcweldingiscarriedouttominimizetheriskof:(a)Scatteredporosity(b)Wormholeporosity(c)Parentmetalcracking(d)Lackofpenetration10.InUKpractice,BS499part2specifiesthatthedrawingdimensionquotedforafilletweldisthe:(a)Leglength(b)Actualthroatthickness(c)Weldlength11.Foropensitemanualmetalarcweldingthefollowingequipmentisavailable.Whichwouldyouchooseforsafeworking?(a)Singleoperatortransformer(b)Multioperatortransformer(c)AC/DCcompositepowerunit(d)Dieselenginedrivenmotorgenerator12.IfSubmergedarcweldingistobeusedtomakebuttwelds,whichwouldyoubemostcriticalof?(a)Therootgaptolerance(b)Theangleofpreparation(c)Therootfacewidth(d)Thegascutfinish13.DuringCO2welding,thearclengthismostlikelytobeaffectedby:(a)Thewirediameter(b)Thecurrentreturnconnection(c)Thegasflowrate(d)Thetorchtoworkangle第3页共47页第2页共47页编号：时间：2021年x月x日书山有路勤为径，学海无涯苦作舟页码：第3页共47页14.Preheatingforarcweldingappliesto:(a)Assemblyweldingonly(b)Assemblyandtackwelding(c)Jointsover25mmthickonly(d)Cruciformweldsonly15.Youseeawelderusinganoxy-acetyleneflamewithalongfeatheredinnercone.Whatwouldbetheeffectofthisonacarbonsteel?(a)Theweldcouldbehardandbrittle(b)Theweldmetalcouldbetoosoft(c)Therewillbenoeffectontheweld(d)Theweldwillhaveundercut16.Awelderqualificationtestistoverify:(a)Skillofthewelder(b)Thequalityofthematerials(c)Thenon-destructivetestprocedures(d)Themanufacturingmethod17.Afabricatingprocedurecallsforfilletweldstobe“blendedin”bygrinding.Thisistoinfluence:(a)HAZcracking(b)Fatiguelife(c)Residualstress(d)Yieldstrength18.Bendtestspecimenshavebeentakenfroma25mmthickcarbonsteelbuttweld.Whichwouldshowlackofinter-runfusion:(a)Sidebend(b)Rootbend(c)Facebend(...
