INSPECTOR-MULTIPLECHOICEQUESTION,Dec7,200

Page1of43CSWIP3.1(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)Lackofrootfusiondefects07.Oneofthefollowingalloysisnon-magnetic.Which?Page2of43(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)Thetorchtoworkangle14.Preheatingforarcweldingappliesto:(a)Assemblyweldingonly(b)Assemblyandtackwelding(c)Jointsover25mmthickonlyPage3of43(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(d)Guidedbend19.Lamellartearinghasoccurredinasteelfabrication.Beforeweldingcouldithavebeenfoundby:(a)X-rayexamination(b)Dyepenetrant(c)Ultrasonicinspection(d)Itwouldnothavebeenfoundbyanyinspectionmethod20.Youaretooverseethearcweldingofsomemachinedfittingsandfindtheyarecadmiumplated.Wouldyou:(a)Permitittoproceed(b)Permitittoproceedwithfumeextraction(c)Stoptheoperationatonce(d)Advisetheweldertodrinkmilkandproceed21.TheunitofJouleswouldbeusedtomeasure:(a)Tensilestrength(b)Impactenergy(c)HardnessPage4of43(d)Electricalresistance22.Submergedarcweldingisaprocessthatgenerallygives:(a)Slagfreewelds(b)Lowpenetration(c)Lowdilution(d)Highheatinput23.Whichofthefollowingdoesnotrequirebakingordrying:(a)E6010(b)E7018(c)SubarefluxwithBasicityIndexof2(d)SubarefluxwithBasicityIndexof324.Awelderandprocedurere-qualificationwouldberequired:(a)Whentherunoutdateoftheprocedurehasbeenreached(b)EveryYear(c)Whenchangingfromdaytonightshiftwork(d)Whenthereisachangeinanessentialvariable25.Tensilestrengthcanbeincreasedinsteelby:(a)Annealing(b)Galvanising(c)Additionofcarbon(d)Casting26.Whichofthefollowingalwaysoccursintheparentmaterial:(a)Hydrogencracks(b)Lapsandlaminations(c)Centerlinecracks(d)Porosity27.TopreventthehardeningandcrackingofHighCarbonSteelplatewhenflamecuttingitisadvisableto:(a)Pre-heattheplate(b)Soaktheplateinoil(c)Cooltheplatequicklyaftercutting(d)IncreasethecuttingOxygenpressure28.Re-crystallizationduringannealingisusedtomakesteel:(a)Softer(b)Harder(c)Tougher(d)StrongerPage5of4329.Youshouldalwaysrefertoahigherauthorityforguidancewhen:(a)Cracksappearduringwelding(b)Thewelderwillnotfollowyourinstructions(c)Instructionsaremissinginthespecificationorcontractdocuments(d)Alloftheabove30.SpattermaybefinelycontrolledduringMIG/MAGweldingby:(a)Adjustingtheinductancecontrol(b)UsingCO2gas(c)Increasingthearcvoltage(d)Weldingwithnogas31.Fatiguetestingisusedtotestwelds:(a)Undercyclicloading(b)Undercreepstressload