AWS WIT-E-2008 WELDING INSPECTION TECHNOLOGY Sample CWI Fundamentals Examination (Fifth Edition).pdf

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1、WELDINGINSPECTIONTECHNOLOGYSample CWIFundamentalsExaminationFIFTH EDITIONPublished ByAmerican Welding SocietyEducation ServicesInternational Standard Book Number: 978-0-87171-663-7American Welding Society550 N.W. LeJeune Road, Miami, FL 33126 2006 by American Welding SocietyAll rights reservedPrinte

2、d in the United States of AmericaFifth Edition 2008Disclaimer. The American Welding Society, Inc., assumes no responsibility for the information contained in this publi-cation. An independent, substantiating investigation should be made prior to reliance on the use of such information.Photocopy Righ

3、ts. No portion of this document may be reproduced, stored in a retrieval system, or transmitted in anyform, including mechanical, photocopying, recording, or otherwise, without the prior written permission of the copyrightowner.Authorization to photocopy items for internal, personal, or educational

4、classroom use only or the internal, personal, oreducational classroom use only of specific clients is granted by the American Welding Society provided that the appropriatefee is paid to the Copyright Clearance Center, 222 Rosewood Drive, Danvers, MA 01923, tel: (978) 750-8400; Internet:.Welding Insp

5、ection TechnologyFundamentals Examination1F1 Which of the following metals cannot be efficiently cut with OFC?a. high-carbon steelb. low-carbon steelc. stainless steeld. cast irone. c and d aboveF2 Electrical conductivity of a part is the primary requirement for which NDE method?a. ETb. UTc. PTd. RT

6、e. VTF3 The melting point of carbon steel is approximately:a. 2250Fb. 2375Fc. 2780Fd. 3005Fe. 3333FF4 Decibel is a term associated with which NDE method?a. UTb. RTc. MTd. PTe. ETF5 Which GMAW metal transfer mode results in the least amount of penetration?a. globularb. short circuitingc. sprayd. puls

7、ed spraye. globular sprayF6 Which of the following gas(es) is commonly used as a shielding gas for GTAW?a. argonb. carbon dioxidec. oxygend. argon/carbon dioxidee. Tri-mixWelding Inspection TechnologyFundamentals Examination2F7 NDE technicians are certified in accordance with:a. AWS D1.1b. API 1104c

8、. ASNT SNT-TC-1Ad. ASME Section VIe. ASME Section IXF8 When a metal is alloyed, how are the atoms of the alloy incorporated into the original metallattice structure?a. by inclusion or exclusionb. substitutionally or interstitiallyc. by dissolvingd. by becoming martensitice. by castingF9 A wire IQI i

9、s used in which NDE method?a. UTb. ETc. RTd. MTe. PTF10 In general, which of the following is not commonly used as a semiautomatic process?a. GMAWb. FCAWc. SMAWd. SAWe. MIGF11 Items to be monitored by VT after welding include:a. extent of weldingb. final weld appearancec. dimensional accuracyd. amou

10、nt of distortione. all of the aboveF12 Crater cracks are most often the result of:a. improper techniqueb. improper filler metalc. improper base metald. trapped slage. trapped hydrogenWelding Inspection TechnologyFundamentals Examination3F13 The tail of a welding symbol should not be used for:a. deno

11、ting welding process requirementsb. denoting welding procedure requirementsc. denoting welding electrode requirementsd. denoting welding specification requirementse. denoting groove angleF14 During tempering, as the temperature increases, which of the following are correct?a. hardness increasesb. ha

12、rdness decreasesc. elongation decreasesd. strength increasese. ductility decreasesF15 In GMAW, the distance from the end of the contact tube to the arc is:a. arc lengthb. electrode extensionc. stickoutd. stand offe. work angleF16 Of the following, which is not a type of metal transfer in GMAW?a. spr

13、ayb. short circuitingc. globulard. pulsed arce. open circuitingF17 Ultraviolet light may be used with which NDE methods?a. VT and UTb. PT and UTc. MT and PTd. RT and UTe. ET and MTF18 The technique which does not aid in reducing residual stress is:a. peeningb. vibratory stress reliefc. thermal stres

14、s reliefd. external restrainte. preheatingWelding Inspection TechnologyFundamentals Examination4F19 Which of the following may not be detected with VT?a. large surface crackb. undercutc. overlapd. underfille. Lamellar tearF20 Heat treatment conditions can be determined using which of the following?a

15、. MTb. PTc. ETd. RTe. LTF21 Which of the following elements are commonly used as alloying elements with tungsten toproduce GTAW electrodes?a. cesiumb. thoriumc. columbiumd. vanadiume. chromiumF22 For single bevel-groove weld symbols, the line of the AWS weld symbol running perpendicularto the refere

16、nce line is always drawn on which side of the weld symbol?a. on the rightb. on the leftc. on either side, depending on company policyd. on the side in which the straight side actually appears in the jointe. does not matterF23 The portion of the groove face within the joint root is called:a. weld int

17、erfaceb. faying surfacec. groove weld edged. root facee. groove angleF24 NDE technicians are usually qualified in accordance with the requirements of:a. AWS D1.1b. API 1104c. ASNT SNT-TC-1Ad. ASME Section VIIIe. ASME Section IXWelding Inspection TechnologyFundamentals Examination5F25 Which of the fa

18、ctors listed below has the least amount of effect on the residual stress anddistortion that results from welding?a. heat inputb. metallurgical phase changesc. welding positiond. tensile strengthe. coefficient of thermal expansionF26 Capillary action plays a role in which NDE method?a. ETb. UTc. RTd.

19、 PTe. MTF27 Which of the following tests would be least effective for judging the soundness of a weld in theas-welded condition?a. nick breakb. side bendc. face bendd. radiographye. straight beam UTF28 Arc blow cannot be caused by:a. magnetic field distortionb. improper worklead (ground) locationc.

20、welding at the end of a jointd. welding in cornerse. welding with ACF29 Which of the following shielding gases is used for GMAW spray transfer on steel?a. carbon dioxide100%b. argon100%c. helium100%d. oxygen2%, argon98%e. argon 75%, carbon dioxide25%F30 Which discontinuity below will provide the sha

21、rpest MT indication?a. surface porosityb. surface crackc. subsurface porosityd. subsurface cracke. indications will be identical for all of the aboveWelding Inspection TechnologyFundamentals Examination6F31 In SMAW, an increase in arc length results in:a. increased current; increased voltageb. decre

22、ased current; increased voltagec. increased heat input; decreased voltaged. decreased current; decreased voltagee. decreased current; increased heat inputF32 Weld inspection reports should always:a. be completed in ink, or typewritten and signedb. be done in pencil so mistakes can be easily correcte

23、dc. be filled out only if the weld is rejectedd. be typed by a clerk so that everything is readablee. include the welders identificationF33 The ability to be cyclically loaded without failing is related to which of the following propertiesof a metal?a. hardnessb. toughnessc. tensile strengthd. fatig

24、ue strengthe. ductilityF34 In GMAW, the type of metal transfer requiring a special power source is:a. sprayb. globularc. pulsed arcd. short circuitinge. open arcF35 Which of the following is truly a volumetric test method?a. RTb. UTc. VTd. MTe. PTF36 Use of preheat will result in:a. a faster cooling

25、 rate and wider heat-affected zoneb. a faster cooling rate and narrower heat-affected zonec. a slower cooling rate and wider heat-affected zoned. a slower cooling rate and narrower heat-affected zonee. none of the aboveWelding Inspection TechnologyFundamentals Examination7F37 Which of the following

26、methods is most likely to use a transducer to scan for flaws?a. RTb. MTc. UTd. PTe. VTF38 For plain carbon steels, how are hardness and tensile strength related?a. increase hardness; decrease tensile strengthb. increase hardness; increase tensile strengthc. decrease hardness; increase tensile streng

27、thd. hardness and tensile strength can both be increased by temperinge. hardness and strength are not relatedF39 In GMAW, the welding variable controlled by the wire feed speed is:a. arc lengthb. voltagec. currentd. stickoute. travel speedF40 The welding variables used to calculate heat input are:a.

28、 voltage and currentb. current and travel speedc. voltage, current, and travel speedd. travel speed, preheat temperature, and voltagee. voltage, current, and preheat temperatureF41 As the temperature of the base metal is decreased:a. impact strength decreasesb. tensile strength increasesc. ductility

29、 decreasesd. hardness increasese. all of the aboveF42 During RT, which of the following provides the best protection from radiation for a giventhickness?a. lead shieldingb. steel shieldingc. concrete shieldingd. copper shieldinge. wood shieldingWelding Inspection TechnologyFundamentals Examination8F

30、43 A weld inspection plan should be developed:a. before welding beginsb. during weldingc. after welding is completedd. before shipping the worke. only when there is a problemF44 If the weld symbol straddles the reference line, it means:a. weld both sidesb. weld arrow side firstc. weld other side fir

31、std. weld has no side significancee. the symbol was drawn incorrectlyF45 An E7018 SMAW electrode exhibits which of the following characteristics?a. low hydrogen; use on AC only; iron powderb. low hydrogen; use on AC and DCENc. low hydrogen; AC and DCEP; iron powderd. rutile; DCEPe. rutile; DCEP; iro

32、n powderF46 Piezoelectricity is a material property used by which NDE method?a. UTb. ETc. RTd. MTe. PTF47 A thermal treatment that follows quenching and restores some of the metals ductility is referredto as:a. stress reliefb. temperingc. hardeningd. normalizinge. postheatF48 Which of these methods

33、is most often used to eliminate the high residual stress created bywelding?a. prebendingb. shot blastingc. quenching rapidly after weldingd. postweld heat treatinge. preheatingWelding Inspection TechnologyFundamentals Examination9F49 The physical principle that permits the migration of liquid penetr

34、ant into very fine surfacediscontinuities is:a. magnetic permeabilityb. optical fluorescencec. capillary actiond. emulsificatione. solubilityF50 The process whereby a large gap is filled with braze material without the help of capillary actionis:a. torch brazingb. arc brazingc. braze weldingd. dip b

35、razinge. flow brazingF51 Which of the following contains ferrous base metal specifications?a. AWS D1.2b. ASME Section II, Part Cc. AWS A5.1d. ASME Section Ve. ASME Section II, Part AF52 Which of the following is considered to be the most portable method of magnetization whenconducting a magnetic par

36、ticle test?a. AC coilb. AC yokec. DC coild. DC prode. Head ShotF53 Advantages of MT include:a. the detection of surface flawsb. both AC and DC methodsc. the detection of surface flaws tightly closed by carbon, slag, or contaminantsd. the fact that it is faster than PTe. all of the aboveF54 In genera

37、l, an increase in the carbon equivalent of a carbon steel will result in an increase in its:a. ductilityb. hardnessc. defectsd. toughnesse. all of the aboveWelding Inspection TechnologyFundamentals Examination10F55 A welding process commonly used to join light gage stainless steel tubing for critica

38、l applica-tions is:a. SMAWb. GMAWc. GTAWd. OFWe. FCAWF56 Hydrogen in the molten weld metal can cause:a. undercut and overlapb. cracking and porosityc. incomplete penetration and incomplete fusiond. porosity and slag inclusionse. hydrogen will diffuse during welding and will not cause problemsF57 Whi

39、ch of the following results from improper termination of the SMAW electrode and shrinkingof the molten weld pool during welding?a. porosityb. slag inclusionsc. delayed crackingd. crater crackinge. incomplete fusionF58 Entrapped slag can result when using all of the following except:a. SMAWb. SAWc. F

40、CAWd. ESWe. GMAWF59 The material property that best describes its ability to withstand a static load is:a. hardnessb. toughnessc. tensile strengthd. fatigue strengthe. torsional strengthF60 The presence of paint on the surface of a part will most greatly affect the results of which NDEmethod?a. PT a

41、nd MTb. RT and UTc. MT and ETd. UT and ETe. ET and VTWelding Inspection TechnologyFundamentals Examination11F61 If no information appears to the left of a groove weld symbol, this means:a. no weld is required on that sideb. the weld is to be complete joint penetrationc. the weld is to be continuous

42、for the entire length of the jointd. beveling is not requirede. weld size is to be determined by the welderF62 Which of the following is not easily detected using RT that is perpendicular to the weld centerline?a. throat crackb. porosityc. side wall incomplete fusion at a bevel angle of 35d. crater

43、cracke. incomplete joint penetrationF63 Dwell time is a term associated with which NDE method?a. MTb. PTc. RTd. ETe. UTF64 The material property expressed in terms of an endurance limit is:a. fatigue strengthb. toughnessc. tensile strengthd. ductilitye. hardnessF65 Fracture toughness results will of

44、ten be expressed in terms of:a. breaking energyb. tensile strengthc. percent elongationd. endurance limite. reduction of areaF66 Shielding of the molten pool in OFW is accomplished by:a. a granular fluxb. a chemical reactionc. an inert gasd. a vacuum chambere. a flux pasteWelding Inspection Technolo

45、gyFundamentals Examination12F67 The last digit of an SMAW electrode designation is an indication of:a. tensile strength of the weld depositb. position the welder is qualified to weld inc. operating characteristicsd. impact strength of the weld deposite. position suitable for electrode useF68 ET can

46、be used to detect which of the following?a. a materials conductivityb. a materials hardnessc. a thin materials thicknessd. a materials heat treatmente. all of the aboveF69 For an SMAW electrode designation E60X3 the “X” refers to:a. the tensile strength of the weld depositb. the position in which th

47、e electrode can be usedc. the type of coatingd. the recommended type of currente. flux chemistryF70 The property of a material that best relates to its resistance to impact loading is:a. endurance limitb. fatigue strengthc. fracture toughnessd. tensile strengthe. ductilityF71 Of the following discon

48、tinuities, which is most likely to be a flaw caused during the manufactureof steel?a. porosityb. laminationc. undercutd. cracke. inclusion slagF72 Which of the following is considered to be an advantage of VT?a. discontinuities can be located and noted when they occurb. it is capable of detecting su

49、bsurface discontinuitiesc. welders can accept their own workd. equipment can be expensivee. it can determine material strengthWelding Inspection TechnologyFundamentals Examination13F73 Which of the following is considered to be part of the welding inspectors responsibility to thepublic?a. undertaking only those assignments for which the inspector is qualifiedb. making public statements as to the quality of a weldmentc. signing for all inspections on the jobd. reporting all discontinuitiese. verify conformance based on past experienceF74 Which of the following processes is p