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2/19/2015 CSWIP3.1QUESTIONS_

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CSWIP3.1QUESTIONS(2) | 153 | 3 |

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b. Thepenetrationandfusionintotherootisverydeep. c. Eachbeadappearstobedistinctlyseparatedfromtheadjoiningbeads. d. Thegrainstructureremainsthesameinallpasses.5. Whatisthemostcommoncauseoffailureinrootbendtests? a. Toohighacurrentsetting.

b. Toolongapauseinthedowncycleoftheweave. c. Lackoffusionandpenetration. d. Toohighatravelspeed.6. Thepurposeofanickbreakspecimenistoprovideatestfor: a. Tensilestrengthandfractureappearance. b. Ductilityandfractureappearance.

c. Elongationandfractureappearance. d. Soundnessandfractureappearance.7. Whichorganisationpublishesthemostcommonlyusedcodeforboilerandpressurevessel

welding?a. AmericanWeldingSociety. b. AmericanSocietyofMechanicalEngineers. c. AmericanPetroleumInstitute. d. AmericanNationalStandardsInstitute.



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d. AmericanNationalStandardsInstitute.8. Alowhydrogenelectrode,accordingtoBS639,wouldcontain:a. Nohydrogen. b. Lessthan15mlofhydrogenper100gramsofdepositedweldmetal. c. Between15mland25mlofhydrogenper100gramsofdepositedweldmetal. d. Lessthan25mlofhydrogenper100gramsofdepositedweldmetal.

9. Thesecondruninathreerunbuttweldusingthestovepipetechniqueisknownasthe:a. Fillingrun.b. Hotpass.c. Intermediaterun.d. Sealingrun.

10. Youcoulddeterminethatanelectrodeiscellulosicbyits: a. BS639coding.b. Colour.c. Tradename. d. BS499coding.11. Whichtypeofelectrodecoatinggivesthemostvoluminousgasshield?

a. Rutile.b. Basic.c. Oxidising.d. Cellulosic.

12. Whichofthefollowingsteelsislikelytobemoresusceptibletohydrogencracking? a. Carbonequivalentoflessthan0.25%. b. Carbonequivalentof0.35%. c. Carbonequivalentof0.38%. d. Carbonequivalentof0.43%.

13. Preheatingandinterpassheatingareusedprimarilyfor:a. Aidingfusion. b. Reducinghydrogencontentofweldpreparationpriortowelding. c. Ensureafinegrainsize. d. Slowdownthecoolingrateafterwelding.14. Submergedarcweldsmadewithre-cycledfluxareliableto:

a. Porosity. b. Coursegrainsize.c. Undercut.d. Incompletepenetration.15. Incompletepenetrationinasingle'V'buttjointcouldbecausedby: a. Toolargearootgap. b. Toosmallarootgap. c. Toohighaheatinput. d. Toosmallarootface.16. Insubmergedarcwelding,whichofthefollowingwidthtodepthratioswouldbelikelyto

resultinsolidificationcracking? a. 1:3. b. 3:1. c. 2:1. d. 1:1.17. Youareresponsibleforcontrollingweldingonsite.Alargeincidenceofporosityhasbeen




17. Youareresponsibleforcontrollingweldingonsite.Alargeincidenceofporosityhasbeen

reportedinrecentwelding.Wouldyouinvestigate? a. Theelectrodetype.b. Powersource.c. Electrodestorage.d. Daytemperature.18. Themainreasonwhyalladheringscaleshouldberemovedwhenthepipeendpreparationis

madebyoxy-gascuttingis? a. Oxidisationoftheweldmetalisminimised. b. Thespeedofweldingisincreased. c. Pipeborealignmentismadeeasier. d. Reductionofthewelddepositisprevented.19. Whenmanualmetalarcweldinglowcarbonsteel,whichelectrodecoveringwillgivethe

greatestdegreeofpenetration?a. Ironpowder.b. Rutile.

c. Cellulosic.d. Lowhydrogen.20. Whentungstenarcgasshieldedweldingstainlesssteel,whichoneofthefollowingshould

beused?a. Alternator. b. A.C.transformer. c. D.C.generator.

d. Constantpotentialrectifier.21. Whichgasshroudshouldbeusedwhentungstenarcgasshieldedweldingaluminium

alloys?a. Nitrogen.b. Carbondioxide. c. Argon/carbondioxidemixture.

d. Argon.22. Themostcommontypeofdefectfoundinastructurewhenitisundergoingserviceis:a. Fatiguecracking.b. Crystallisation.c. Welddecay.d. Stressfracture.23. Intheexaminationofaweldedaluminiumjoint,macroetchingmayreveal: a. Lackofinter-runpenetration.b. Carbonpick-up.c. Welddecay.d. Microcracks.24. MMAweldsmadewithdamagedelectrodecoatingsaresubjectto:

a. Porosity.b. Undercut.c. Excessivepenetration. d. Excessivebeadheight.25. WhichphysicaltestismorelikelytorevealHAZembrittlement?a. Transversetensile.

b. Allweldtensile.c. Rootbend.

1.Questions

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b. Allweldtensile.c. Rootbend.d. Charpyimpact.26. Whichofthefollowingdestructivetestsisnotnormallyrequiredforwelderapproval?a. Bendtests.b. Macroexamination.

c. Impacttests.d. Fracturetests.


27. Toolargeadiameteroffillerrodshouldnotbeusedtomakeaweldedjointbecause: a. Excessreinforcementprofilewillbedifficulttoobtain. b. Theincludedbevelanglewillhavetobereduced. c. Rootfusionmaybedifficulttoobtain. d. Thegapsettingwillhavetobechanged.28. Ifpipeboresarenotmatchedcorrectlyitcanresultin: a. Lackofrootpenetration.

b. Incorrectgapsetting.c. Excessiverootfaces. d. Overheatingduringwelding.29. Acorrectlymadetackweldshouldslopefromthemiddletotheendsinorderto: a. Aidbetterpenetrationatthejoin-up. b. Preventporosityatthejoin-up.

c. Reducetheelectrodesizerequired. d. Reducetheoverallconsumableconsumption.30. Twolowcarbonsteelpipes,150mmdiameterand6mmwallthickness,aretobebuttwelded

usingtheTIGprocess.Toensureafullstrengthjoint,whichofthefollowingprepsismostsuitable?

a. Opensinglebevel.b. OpensingleVee. c. Opensquarepreparation. d. Closedsquarepreparation.

PROPERTIESOFMATERIALS1. Theabilityofamaterialtowithstandaloadpullingitapartiscalledits______________.

2. Theabilityofamaterialtobestretchedoutwithoutbreakingiscalled_______.3. AnIzodimpactmachineisusedtogiveindicationofthe_______ofamaterial.4. Theabilitytowithstandindentationiscalled_______.

5. Lackofductilityiscalled_______.6. Thepropertyofametaltoreturntoitsoriginalshapeiscalled_______.7. Increaseincarboncontentcausesan_______instrengthandhardness.8. Whencarbonpercentageincreases,thereisadecreasein_______.9. Lowcarbonsteelcontainslessthan_______carbon.10. Lowductilityinaweldmetalcouldresultin_______.11. Alloyingisusedto_______mechanicalandphysicalpropertiesofasteel.12. Sulphurandphosphorusarenotalloyingelements;theyare_______.

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13. Alloyingallowsdesignerstouse_______sectionsandstillhavethesamestrength.14. Analloythatcontainsahighpercentageofchromiumandnickelwouldhaveresistanceto _______.15. Quenchingacarbonorlowalloysteelwillresultinan_______inhardnessanda_______in ductility.16. Thehardconstituentthatresultswhensteelisquenchediscalled_______.

17. Thetoughlaminatedstructurethatisformedonslowcoolingofferriteandironcarbide (cementite)iscalled_______.18. Theamountofmartensiteformeddependsonthespeedof_______andthepercentageof _______.

19. Afterquenching,thestructuremaybeimprovedbyreheatingto200-300 C.Thisiscalled________.20. Smallpercentagesofchromiumwillincreasethestrengthand_______,whileasmall

percentageofnickelwillincrease_______.

ANSWERS

PAPERONE1.d 2.d 3.b 4.c 5.c 6.b 7.c 8.a 9.c 10.a 11.d 12.a 13.b 14.b15.c 16.a 17.a 18.b 19.a 20.d 21.c22.a 23.d 24.c 25.d 26.d 27.c 28.b

29.b 30.bPAPERTWO1.b 2.a 3.b 4.d 5.c 6.c 7.d8.d 9.d 10.d 11.b 12.b 13.c 14.b15.c 16.b 17.b 18.c 19.b 20.c 21.b

22.d 23.c 24.b 25.c 26.c 27.b 28.b29.d 30.bPAPERTHREE1.d 2.a 3.d 4.d 5.d 6.c 7.b8.d 9.d 10.d 11.d 12.d 13.b 14.d15.d 16.d 17.b 18.d 19.a 20.d 21.d22.d 23.d 24.c 25.d 26.d 27.d 28.b29.c 30.bPAPERFOUR



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