1. From the following electrode coding E50 4 B 160 20 H5, the compulsory part is:

a. E50 4 B 160 20 H5.

b. B 160 20 H5.

c. E50 4 B.

d. None of the above.

2. Which of the following is applicable for the HAZ on a C/Mn steel weld if the heat input increases:

a. Both hardness and width is increased.

b. Hardness decreases, width increases.

c. Both hardness and width decreases.

d. Hardness increases, width decreases.

3. Which of the following materials are the most susceptible to HICC in the weld zone

a. Carbon Manganese steel

b. Micro alloyed steel (HSLA).

c. Austenitic steel

d. Both a and b

e. All of the above

4. What are the advantages of fused fluxes?

i. They’re homogeneousii. They’re less hygroscopic than other typesiii. There are no limits to their compositioniv. Fine particles can be removed easilyv. They’re easily recycled

A. Statements i & ii are correctB. Answer i and iii are correctC. Answer iii and iv are correctD. Statements i, ii.iii and v are correctE. All of the above are correct

5. Which of the following is applicable to the heat treatment process of normalising on carbon-manganese steel

a. It is always carried out below the lower critical limit.

b. It is carried out to ensure the material has maximum tensile strength.

c. It is carried out to ensure the material is of maximum ductility and malleability in preparation for extensive cold working operations.

6. The HAZ associated with a fusion weld:

a. Can not be avoided.

b. Usually has the highest tensile strength.

c. Is usually martensitic.

d. Both a and b.

e. All of the above.

7. Which of the following additions may be added to an electrodes flux to act as a stabilizer?

a. Sodium silicate

b. Silicon

c. Manganese

d. Titanium dioxide.

8. Which of the following is applicable to electrode efficiency?

a. The mass of metal deposited as a percentage of the mass of core wire melted.

b. Iron powder electrodes have efficiencies above 100%.

c. Electrodes of high efficiencies tend to produce welds of a smooth flat profile.

d. Both a and b.

e. All of the above.

9. Proof stress is used when non-ferrous metals are undergoing tensile tests to determine the equivalent:

a. Tenacityb. Elasticityc. Yield strengthd. Tensile strength

10. To test a component for vibrational loading, a suitable mechanical test would be:

a. Impactb. Tensile

c. Compressived. Fatigue

11. In the welding of a butt joint from one side, the profile of the root bead is controlled by:

a. Root faceb. Bevel anglec. Root gapd. All of the above

12. A steel described as QT will have improved tensile properties because it has:

a. Had control of chemical compositionb. Been heat-treatedc. Been quality testedd. Been vacuum melted

13. In submerged arc welding excessive arc voltage may cause:

a. Excessive penetrationb. Change in weld metal compositionc. Narrow weld widthd. Excessive bead profile

14. Austenitic stainless steel electrodes are generally smaller in length than mild steel electrodes because:

a. High amperage is usedb. Shelf life will be decreasedc. Their electrical conductivity is less than that of steeld. They are more expensive

15. When MMA welding low carbon steel which electrode will give the greatest deposition rate?

a. Hydrogen controlledb. Cellulosicc. Rutiled. Iron powder

16. Inherent rectification of the electrical output is produced in the arc when TIG welding using:

a. AC with a suppressorb. AC without a suppressorc. DC with reverse polarityd. DC with straight polarity

17. Gamma rays and X-rays are part of a family of waves called:

a. Acoustic waves

b. Light wavesc. Electromagnetic wavesd. Transverse waves

18. Submerged arc utilises:

a. Deep penetration characteristic.b. High deposition rates on DC+.c. Flat (PA) welding only.d. None of the above.

19. You suspect that ferritic steel plates contain cracks in the prepared edges. What NDT method would you use to check this?

a. Radiography.b. Magnetic particle inspection.c. Penetrant inspection.d. Ultrasonic flaw detection.

20. An eutectoid mixture in steel is: (Thep cung tich)

a. A mixture of ferrite and austenite.b. A mixture comprising a substitutinal solid solution.c. Called pearlite.d. Called ledeburite.

21. The purpose of pre-heating low alloy steel pipes before electric arc welding is to:

a. Refine grain structure.b. Relieve internal stress.c. Retard rapid cooling.d. Regulate excessive expansion.

22. Cold cracking is most likely to occur in a weldment if:

a. The rate of cooling is too fast.b. The rate of cooling is too slow.c. It lacks ductility at high temperatures.d. Impurities are present at its grain boundaries.

23. Percentage elongation of a metal undergoing a tensile test is a measure of:

a. Elasticity.b. Plasticity.c. Ductility.d. Malleability.

24. When a longitudinal load is put on a lap joint, the stress set up is normally:

a. Shear stress. (Usuat cat)

b. Tensile stress.c. Compressive stress.d. Residual stress.

25. Columnar growth takes place when a metal is:

a. Cold.b. Losing heat.c. Being heated.d. Being rolled.

26. The type of crystal normally found in a single run arc weld in the as welded condition is:

a. Equi-axed.b. Polycrystalline.c. Dendritic.d. Columnar.

27. A root bend test is used to test the amount of weld:

a. Ductility.b. Elongation.c. Hardness.d. Penetration.

28. What would be observed if a fillet weld were sectioned and macro-etched?

a. The grain of the other beads is coarser than the final bead.b. The penetration and fusion into the root is very deep.c. Each bead appears to be distinctly separated from the adjoining beads.d. The grain structure remains the same in all passes.

29. You could determine that an electrode is cellulosic by its:

a. BS 639 coding.b. Colour.c. Trade name.d. BS 499 coding.

30. The main reason why all adhering scale should be removed when the pipe end preparation is made by oxy-gas cutting is?

a. Oxidisation of the weld metal is minimised.b. The speed of welding is increased.c. Pipe bore alignment is made easier.d. Reduction of the weld deposit is prevented.

31. In submerged arc welding excessive arc voltage may cause

A excessive penetrationB change in weld metal propertiesC narrow weld widthD excessive bead profile

32. Which of the following is likely to give the highest impact strength in ferritic weld metal?

a) Cellulosic electrodesb) Submerged arc with acid fluxc) Spray transfer Co-2-weldingd) Basic coated normal metal arc electrodes

33. What two functions in arc welding must be in equilibrium to enable a stable arc to be established? (seek advide)

a) Arc voltageb) Currentc) Wire/electrode feed rated) Metal burn-off rate

34. What destructive test would be required to ascertain the likelihood of cracking in the HAZ of a weld? (seek advide)

a) Nick breakb) Side bend testc) Charpy inputd) Macro test

35. When visually inspecting a fillet weld, it would normally be “sized” by:

a) The leg lengthsb) The actual throat thicknessc) The design throat thicknessd) Both A & C

36. The planar defect is: (seek advide)

a) Incomplete fusion defectsb) Slag inclusionc) Incomplete penetration

d) Both A & C

37. Defects outside of the limits specified in a standard should always be: (seek advide)

a) Repairedb) Reported to “a senior person”c) Assessed along with other defectsd) All of the above

38. A large grain structure in steels is said to produce:

a) Low ductility valuesb) Low fracture toughness valuesc) High fracture toughness valuesd) High tensile strength

39. The likelihood of brittle fracture in steels will increase with: (seek advide)

a) A large grain formationb) A reduction of in service temperature to sub zero levelsc) Ferritic rather than austenitic steelsd) All of the above

40. The use of cobalt as an isotope would generally be used on: (seek advide)

a) Thin materialsb) Tee jointsc) Plate thickness greater than 25mm d) None of the above

41. The correct term for cap height is: (seek advide)

a) Reinforcementb) Cap profile height c) Excessive weld metald) All of the above

42. The important point if high temperature steel is that: (seek advide)

a) They can withstand creep failureb) They may suffer re-heat cracking problemsc) They may suffer loss of toughnessd) All of the above

43. An austenitic stainless steel may suffer:

a) Weld decayb) Sensitizationc) Solidification crackingd) All of the above

44. Ultrasonic would be prefer over radiography due to: (seek advide)

a) Ability to find more defectsb) Lowest skill requirementsc) Ability to detect laminationsd) Both a) and c)

45. Which form of NDT could be used on a fillet weld on aluminum?

a) Dye penetrant testingb) Ultrasonic testingc) Radiographyd) MPIe) a, b and cf) D onlyg) All of the above

46. Fish – eyes, chevron cracks and fissures are: (seek advide)

a) Not associated with weldingb) Types of cracksc) Only encountered in MMA weldsd) Hydrogen related problems

47. The toes of the cap on a butt weld:

a) Must overlap on the external surface of a pipe or plate by at least 1.5mmb) Must be groundedc) Must never be groundedd) None of the above

48. Quality assurance is: (seek advide)

a) The inspection of a product or serviceb) A management system designed only to ensure material compatibilityc) Not solely related to planning and inspectiond) The implementation of quality control

49. Which NDT method would never be use on a 6” Aluminum pipe weld?

a) Radiographyb) Magnetic particle inspectionc) Ultrasonic testingd) Dye penetrant testing

50. Why is hot – pass so-called?

a) Because it is applied at a high amperageb) Because it is applied when the root is still hotc) Because it could cause ‘hot – shortness’d) Because it heat treats the root

51. Generally speaking a welding inspector, as a minimum requirement: (seek advide)

a) Must have at a thorough knowledge of NDTb) Must know how to interpret radiographsc) Must have a thorough knowledge of welding metallurgyd) None of the abovee) All of the above

52. A welding Inspector:

a) Must know how to interpret radiographsb) May be required to interpret radiographs on certain contractsc) Should be able to weldd) Both b and ce) All of the above

53. Which electrodes are very susceptible to causing porosity in the deposited welds if long arc employed?

a) Basic b) Cellulosicc) Rutiled) None of the above

54. Which mechanical test (s) can be used to make an assessment of surfacing breaking defects?

a) Bend testb) Nick – break testc) Macro testd) None of the abovee) All of the above

55. What is the purpose of a tensile test?

a) To assess tensile strengthb) To assess ductilityc) To assess yield strengthd) All of the above could be assessed

56. Stress is equal to:

a) Stress b) Load divided by cross – sectional areac) Extension of gauge length divided by original gauge lengthd) Toughness

57. Strain is equal to:

a) Stressb) Load divide by cross – sectional arec) Extension of gauge length divided by the original gauge lengthd) Toughness

58. Stress can be measured in: (seek advide)

a) N/mm²

b) PSIc) mmd) Both a and be)

59. Herringbone porosity is:

a) A particular pattern of porosityb) Made up of wormholesc) Made up of pipingd) All the above are correcte) None of the above

60. Distortion: (seek advide)

a) Is plastic deformationb) Is elastic deformationc) Is another term for stressd) May be elastic or plastic deformatione) All of the above