2001년도 ASNT LEVEL III

BASIC 기출문제

PART I

Metal/Welding/Methods

 

 

1. The dependent strain occurring under constant stress, typically

    at high temperature,  is referred to as ;

 

  ①  creep

   ② hot cracking

   ③ delayed cracking

   ④ thermal fatigue

 

2. In a rotating shaft subjected to bending, a sharp change of

   section thickness is a likely site for ;

   ① corrosion

   ② fretting

  ③ fatigue cracking

   ④ erosion-corrosion

 

3. A technical specialty that predicts material behavior based upon

   the size and location of discontinuities, material properties and

   stress distribution is known as ;

 

   ① fracture control               

   ② fatigue and fracture control

   ③ fracture mechanics

   ④ failure prediction

 

4. A change in dimensions directly proportional to an increase or

   decrease in applied force is called ;

 

   ① plastic deformation

   ② plastic flow

  ③ elastic deformation 

   ④ fatigue

 

5. A test used to determine the maximum temperature at which a

   specimen fractures is referred to as a ;

 

   ① root bend test

   ② strength test

   ④ Brinell test

 

6. A test used to determine the influence of notches on the

   fracture behavior of steel is known as ;

 

   ① a reduced-section tensile test

   ② a coupling test

   ③ a root bend test

   ④ an impact test

 

   corresponding with strain is a measure of ;

 

   ① Moh"s scale

  ③ Modulus of elasticity

   ④ Poisson"s ratio

 

8. A condition resulting in embrittlement, cracking, or blistering in

   some metals can be the result of ;

 

   ① fatigue

   ② creep

   ③ exposure to a hydrogen atmosphere

   ④ chromium depletion

 

9. Contaminates river or salt water is retained for six weeks in a

   304 S/S pipe line. When the water is removed, fine surface

   indications are visually observed on the inside of the pipe walls.

   When the pipe ID is examined with liquid penetrant, the

   indications form fine crack-like patterns. These patterns, under

   magnification, have the appearance of tiny worm holes. They are

   most likely the result of  ;

 

   ① microbiologically influenced corrosion

   ② hydrogen induced cracking

   ③ trans granular stress-corosion

   ④ acid corrosion

 

10.In the forging of C/S material, discontinuities caused by

    improper mating of forging dies are referred to as ;

 

   ① parting

  ② forging laps

   ③ flakes

   ④ seams

 

11.Which principal alloying element produces the corrosion

    resistance of S/S ;

 

  ① Chromium

   ② Magnesium

   ③ Phosphorus

   ④ Silicon

 

12.A method of protecting aluminum which places an oxide coating

   on the surface is called ;

 

   ① Clad welding

   ② Case hardening

   ③ Anodizing

   ④ Paining

 

13.Coating one metal with another metal for the purpose of

   protecting against stack is known as ;

 

   ① Anodizing

   ② press fitting

   ③ cladding

   ④ austenization

 

14.In which combination of manufacturing methods do both methods

   sometimes produce laps ;

 

   ① welding and casting

   ② rolling and extruding

  ③ casting and powered metallurgy

   ④ rolling and plating

 

   increase the cooling rate is known as a ;

 

   ① Core support

   ② Cold shut

   ③ Chill

   ④ Chaplet

 

16.A steel valve body weighting more than one ton(1 ton) would

   most likely be formed by which of the following processes ?

 

   ① Investment casting

  ② Sand casting

   ③ Dia casting

   ④ Centrifugal casting

 

17.During solidification in the casting process, which of the

   following statements is true ?

 

  ① The smallest grain size is found at the surface

   ② Grain size remains constant as the cooling continues

   ③ The grain size becomes smaller as cooling continues

   ④ The smallest grain size is found at the center of the

       cross-section

 

18.The combination of excessive restraint during welding and

    inadequate ductility can result in ;

 

   ① carbide segregation

   ② lamellar tearing

   ③ warpage

   ④ fatigue cracks

 

19.Which of the following conditions would exctusively indicate

    intentional degastion of a weld ;

   ① slugging

   ② undercut

   ③ scalping

   ④ creter cracks

 

20.Crater cracks in welds are caused by ;

   ① delayed breaking of the welding arc

   ② premature breaking of the welding arc(또는 용융금속이 응고되기 전        에 shield gas 공급이 중단되었을 때)

   ③ voltage and current too low during weldings

   ④ heat input too high

 

21.What change in a SMAW welding technique with decreased the

   weld penetration in a V-groove butt weld ?

 

   ① increase travel speed

   ② decrease root face

   ③ decrease travel speed

   ④ increase wire feed speed

 

22.An NDT Level III technician observes a magnetic particle linear

    indication in the surface of a weld what action is required first

    ;

 

   ① to reject the part if a crack is suspected and notify the

      materials review board

   ② to eval‎uate the indication to applicable acceptance criteria

  ③ interpret the type and relevance of the indication

   ④ to accept the part after a fracture mechanics analysis

 

23.Through what mechanism does heat treating, when properly

    performed, remove work-hardened properties ?

 

   ① local remelting

   ② recrystallization

   ③ local plastic flow

   ④ diffusion of more dense elements to the grain boundaries

 

24.A material which exhibits strain hardening by deformation,

   usually at room temperature, has been ;

 

  ① cold worked

   ② heat treated

   ③ annealed

   ④ stress relieved

 

25.Laminations in steel sheet are oriented ;

 

   ① perpendicular to the surface of the sheet

   ② parallel with the principal surfaces of the sheet

   ③ transverse to the rolling direction of the sheet

   ④ at an angle to the principal surfaces which proportional to the

      rolling speed

 

26. Which of the following flaws can be found in extrusions?

 

   ① Shrinkage

   ② Chevrons

   ③ Lamination    

   ④ Flakes

 

27.If an angle-beam shear-ware is used to examine plate material,

   the type of discontinuity that most likely will go undetected is ;

 

   ① a lamination parallel to the plate surface

   ② a randomly oriented oxide inclusion

   ③ a crack normal to the plate surface

   ④ an edge crack

 

28.During a cold rolling process on carbon steel, ductility in the

   direction of flow of the rolled material will

 

   ① decrease

   ② become anisotropic

   ③ be unaffected 

   ④ increase

 

29.Which type of casting process is capable of achieving the

   smoothest as-cast surface?

 

   ① sand casting          

   ② Die casting  

   ③ Investment casting

   ④ Permanent mold casting.

 

30. In an aluminum-boron composite, matrix bonds are formed by;

 

   ① thermal bonding

   ② adhesive bonding

   ③ diffusion bonding

   ④ fusion bonding

 

31.Superficial hardness testers are frequently used to determine

   (확인요!)

   ① precipitation hardening

   ② local deformation

   ③ spot toughess

   ④ case hardening

 

32.Surface roughness measured as the arithmetical average

   deviation of heights and form a mid-point is call the;

 

   ① average waviness value

  ② root mean square value

   ③ real surface deviation

 

33.an ideal sampling plan should

 

   ① assume an 85% confidence level on 90% of the parts

   ② guarantee that all good lots are accepted and all bad lots are 

      rejected

   ③ represend the smallest sample possible th give the required 

      quality level

   ④ be selected on non-random basis for 50% of the production

      items

 

34.  AE will

 

   ① identify active crack propagation

   ② detect side wall-lack of fusion

   ④ define the area amplitude of cluster porosity

 

35.AET makes use of the Kaiser effect. This phenomenon is best

   explained as the;

 

   ① felicity integration during the final loading in an AET

   ② proportional increase in AE as load increases to yield

   ③ absence of (undetectable) acoustic emmision until previously          encountered load levels are exceeded

   ④ random noise generated due to high mechanical back ground

      noise

 

36.The source of AE energy is

 

   ① the elastic wave induced by the pulser into object being tested

  ② (the elastic produced when the material deforms)

      elastic stress to yield point

   ③ The mutual attraction of crack surfaces

   ④ the elastic stress field in the material

 

37.Electromagnetic induction is the principle underlying

 

   ① RT

   ② UT

   ③ AE 

   ④ ET

 

38.Which property of material affects the standard depth

   penetration currents into that material?

 

   ① specific gravity 

   ② tensile strength

  ③ electrical conductivity 

   ④ coefficient of thermal expansion

 

39.For metals, Eddy current testing is best suited to defect ;

 

   ① inclusions

   ② Pipe  

   ③ lamination  

  ④ fatigue crack

 

40.lipophilic emulsifiers should be checked regularly for ;

 

   ① color

   ② water contamination 

   ③ density   

   ④ viscosity

 

41.What is the proper environment for interpreting the results of a

    fluorescent penetrant examination?

 

   ① white light in darkened area

   ② black light in a nomally-lighted area

  ③ ultraviolet light in a darkened area

   ④ high-intensity ultraviolet light in normally-light area

 

42.which liquid penetrant examination technique allows the use of

   a prerinse peration to remove excess penetrant?

 

   ① water-washable

   ③ solvent removable

 

43.To determine amperage for longitudinal magnetization of a steel

    bar divide the constant value (45,000) by the;

 

   ① L/D ratio of the bar

  ② L/D ratio tines the number of coil turns

 

     is affected by the;

 

   ① length of the discontinuity

   ② size of the contact area

   ③ amperage used during magnetization

  ④ depth of the discontinuity

 

45.most hydrocarbon forms area transparent to r-ray but readily

    absobe(Al) ;

 

   ① x-ray in the range of 120 to 150 KVP

   ② thermal neutrons

 

46. 반가층이 0.19inch 일때 32mR/hr => 2mR/hr 이하로 하고자 할 때 두께      는?

 

   ① 0.96 (계산치는 0.76)

   ② 0.72

   ③ 0.48

   ④ 0.32

 

47.A common precaution used for avoiding static marks on

   radiographic film is to;

 

   ① place lead screens on both side of the film

  ② slide film out of the box slonly

 

48he halogen content of penetrant materials requires control for

   the examination of parts produces;

 

  ① titanium

   ② Al

   ③ Cu 

   ④ Mg

 

49.Techniques associated with the eddy current test method may be

    used for which one of these applications ?(3)

 

   ① Determining the state of heat treatment in 70 50 Al

   ② Finding unbonded areas in roll-clad Al plate

   ③ Detection of fine cracks throughout one-half inch thick

      titanium plate.

   ④ Determining the thickness of a lately paint coating on a one

      inch thick acrylic resin panel

 

 

50.Which of the following tests would indicate whether a stainless

   steel part is a 400 series or a 300 series stainless steel ?(3)

 

   ① Specific gravity

   ② Hardness

   ③ Magnetic attraction

   ④ Tensile strength

 

51.In a weld radiograph, small irregularly -shaped areas of lower

   film density might occur if the weld is made by which of the

   following processes ?(1)

 

   ① GMAW

   ② PAW

   ③ SAW

   ④ Ultrasonic welding(USW)

 

52.Which of the following weld joints is best suited to radiographic

   examination ?(2)

 

   ① Lap

   ② Butt

   ③ Edge

   ④ Tee

 

53. 다음의 MT 방법 중에서 direct 빙법인 것은 ?

 

   ① yoke

   ② head shot

   ③ central conductor

   ④ wet fluorescent

 

54. toughness may be defined briefly as the ability of a weld metal

     to ; (absorb energy without fracture)

 

   ① be hardened by heat treatment

   ② be easily deformed

   ③ absorb mechanical energy

   ④ absorb heat energy

  ⑤ none of the above

 

55. it is generally agreed that the cause of underbead cracking in

    steel weldments is largely due to ;

 

   ① preheating the weldments prior to welding

   ② use of shielding gases such as argon or helium

   ③ use of high heat input

  ④ diffusion of considerable hydrogen into the heat affected zone

      and transformation of austenite to martensite

 

56. a type of welding process that would not exhibit a heat affected

    zone when bonding an aluminum plate to a steel plate is;(3)

 

   ① electron beam welding

   ② laser beam welding

  ③ explosion welding

   ④ electrogas welding

 

57. brazed joint에 대하여 가장 적절한 검사방법은 ?

 

   ① RT

   ② UT

  ③ VT

   ④ MT

 

58.fatigue cracks are caused by ;

 

   ① repeated loading

   ② bending

   ③ vibrating stresses

   ④ all of the above

 

59. which of the following is service originating defect ?(3)

 

   ① laps

   ② flakes

   ③ stress corrosion

   ④ hot tear

 

60. surface type casting defects that are caused by a nomentary

     interruption of metal flow resulting in partial freezing and

     subsequently an oxide coating forms on the surface is ;(1)

 

  ① cold shut

   ② shrinkage cracks

   ③ seams

   ④ tears

 

61. these are surface rolling defects generally long, straight and

     in the billet. what is these defects ?(4)

 

   ① burst

   ② flakes

   ③ laps

   ④ seams

 

62. These may occur as large voids or a thin hairline crack,

     generally caused by improper forging technique and too rapid

     cooling.  What is these defects ?(1)

 

   ① bursts

   ② oxide inclusions

   ③ laps

   ④ cold shuts

 

     teasures the leakage fieid at the outside surface of the tube;(4)

 

   ① outside-diameter discontinuities are detected

   ② both outside-diameter and inside-diameter discontinuities may

      be detected

   ③ both outside-diameter and inside-diameter discontinuities can

      other

   ④ both outside-diameter and inside-diameter discontinuities can

 

64. 건식자분의 유동성이 제일 좋은 것은?

 

     HWDC  이외에 AC로 물어보는 문제

 

65. 할로겐가스를 이용한 LT 방법과 관련된 것은?

 

     Hydrostatic

 

66. 용접된 탱크 내부에 15psi의 높은 압력으로 누설시험을 한 결과 누설이 없음       을 알았다. 이 탱크에 대하여 누설이 없음을 보증하고자 누설시험을 추가하고       자 한다. 다음 중 가장 경제적이고, 신속한 검사방법으로 적당한 것은?

 

     buble testing

     change pressure testing

     mass flow testing

     ?

 

67. RT에서 double film을 사용하고자 한다. 다음 중 맞는 것은 ?

 

    screen-film-film-screen

 

68. PT 시험을 하고자 한다. 시험표면에 대한 전처리 방법으로 옳지 않은 것은 ?

 

    grit blasting

    vapor degrease

    solvent cleaning

    ?

 

69. prod를 사용하여 시험하고자 한다. 이때, prod의 자화력을 측정하는 것으로       옳은 것은 ?

 

    gauss meter

    pi gage

    lux meter

    field indicator

70. UT에서 종파와 황파를 물어보는 문제

 

    횡파가 종파보다 파장이 짧기 때문에 결함 검출도가 높다

 

71. UT에서 분해능을 물어보는 문제.

 

    근접한 결함에 대해서 그 결함을 분리 측정할 수 있는 능력

 

72. UT에서 standard reference block을 이용하여 calibration을 하는 목적       은 ?

 

    시험체에 대한 상대적인 평가 데이터 획득

 

73. 용접에서 filler metal이 필요하지 않은 용접방법은?

 

     electron beam welding

 

74. 용접에서 warp과 관련된 문제.

 

75.

 

PART II

SNT-TC-1A(1996) & CP-189(1992)

 

 

2001년도 시험에서는 SNT-TC-1A와 CP-189에 서술되어 있는 내용을 그대로 출제(단편적인 내용)한 것이 아니라, Application에 중점을 두어 출제가 되었음.

 

 

1. SNT-TC-1A에서 1.4항에 관련된 문제.

 

   In development a written practice, the employer should review        the detailed recommendations presented herein and modify them,     as necessary, to meet particular needs.

 

2. SNT-TC-1A에서 2.1(8)에 관련된 문제.

 

   Experience : work activities accomplished in a specific NDT                           method under the direction of qualified supervision                      including the performance of the NDT method and                      related activities but not including time spent in                        organized training program.

 

3. SNT-TC-1A에서 2.1(9) Outside Agency에 관련된 문제.

 

   NDT Level III Service : No company ASNT Level III is available

 

4. SNT-TC-1A에서 4.2에 관련된 문제.

 

   Trainee shall not independently conduct, interpret, eval‎uate, or       report the results of any NDT.

   Trainee should work with certified individual(Level I, II, III).

   여기서 LEVEL I, II, III에 대한 책임과 권한사항을 조합한 문제.

 

5. SNT-TC-1A에서 4.3(2)에 관련된 문제.

 

   LEVEL II의 책임과 권한 : ---should be qualified to set up and                                        calibration equipment --------.

 

6. SNT-TC-1A에서 4.3(3)에 관련된 문제.

 

  

7. SNT-TC-1A에서 5.2에 관련된 문제.

 

   ---- should describe the responsibility of each level of                       certification for-----

 

8. SNT-TC-1A에서 6.3(2)에 관련된 문제.

 

   NDT Level III가 되기 위한 최소 요건은 ?

 

   Recommended Practice as defined in the employer's written           practice.

 

9. SNT-TC-1A에서 8.1(3)에 관련된 문제.

 

   NDT Level III 응시자가 BASIC에 대해서 60문제 중 45문제, Method에      대해서 90문재 중 75문제를 맞췄다. 그럼 이 사람의 경우, NDT Level III를     취득하려면, Specific 시험에 대해서는 몇 문제 중 몇 문제를 맞춰야 하는 가?

 

  문제를 푸는 과정에서 문항수와는 상관이 없음.(즉, 20문제일 필요는 없다는 것     임.)

 

10. SNT-TC-1A에서 8.2(1)에 관련된 문제.

 

   Min. Jaeger No. 2 at a distance of not less than 12 in. and an         Ortho-Rater Min. of 8

 

11. SNT-TC-1A에서 8.2(2)와 관련된 문제.

 

   initial certification and at three-year intervals thereafter

 

12. SNT-TC-1A에서 8.4(2)에 관련된 문제.

    ----- also cover the specification or codes and acceptance            criteria used in the (employer's) NDT procedure

 

13. SNT-TC-1A에서 8.6에 관련된 문제.

 

   Sample questions are intended as examples only and should not       be used verbatim for qualification examination.

 

14. SNT-TC-1A에서 8.7에 관련된 문제.

 

    Reference materiald의 종류 및 사용범위에 대한 것과 Level I, II 시험에      대한 모든 문제는 책임 있는 NDT Level III가 승인(approved by)

 

15. SNT-TC-1A에서 8.8(3)에 관련된 문제

 

    기본적으로 NDT Level III 시험 종목은 Basic, each appplicable NDT      Method, Specific로 구성돠어 있다. 단, 8.8(3) (b)인 경우에는 specific       시험이 면제될 수 있다.

 

16. SNT-TC-1A에서 9.4에 관련된 문제

 

   기록 및 유지하여야 할 사항들은 ?

 

17. SNT-TC-1A에서 9.5(1)(a)에 관련된 문제.

 

    Evidence of continuing satisfactory performance

 

18. SNT-TC-1A에서 9.5(2)에 관련된 문제.

 

    Level I, I : 3 years

    Level III  : 5 years

 

19. SNT-TC-1A에서 10.1에 대한 문제

 

20. CP-189 7.2 b)항과 관련하여 SNT-TC-1A는 어떻게 서술되어 있는가?

 

    SNT-TC-1A의 10.2 (2)와 (3)

21. CP-189에서 7.1 a)에 관련된 문제.

 

    Expiration에 대한 것

 

22. CP-189에서 4.1.1에 관련된 문제.

 

    To receive credit for training hours, --------- shall pass a          final examination-------.

 

23. CP-189에서 4.4.1에 관련된 문제.

 

    NDT Instructor의 제일 요건 : ASNT LEVEL III 소지자

 

24. CP-189에서 6.3.1에 관련된 문제.

 

    Apprndix B에 의거하여 교육을 시행할 경우 그 범위에 대한 문제.

 

25. CP-189에서 5.3에 관련된 문제

 

26. CP-189에서 NDT Level III designation에 관련된 문제

 

27. SNT-TC-1A에서 4.1에 관련된 문제

 

28. CP-189에서 3.1에 관련된 문제

 

29. CP-189에서 Appendix A에서 note B와 관련된 문제

 

30. CP-189에서 Appendix A에서 note C, D와 관련된 문제

 

31- 45.

    - 전체 내용(SNT-TC-1A)을 조합한 내용들이 출제.

    - ASNT 윤리위원회 관련문제 1문항 : 실제적으로 윤리위원회에서는 책임을                                               지는 행위 즉, 합부에 대한 결정을                                               하지 않으며, 중재역할까지는 한다.

    - Outside Agency를 제공할 경우 Certify에 대한 권한이 없는 사람에 대한         문제 1문항(2000년 기출)