CSWIP 3.

1 (WELDING INSPECTOR) MULTIPLE CHOICE QUESTIONS

1. Submerged arc welding is a process that generally gives:

(a) Slag free welds

(b) Low penetration
(c) Low dilution
(d) High heat input

2. Which of the following does not require baking or drying:

(a) E 6010
(b) E 7018
(c) Sub are flux with Basicity Index of 2
(d) Sub are flux with Basicity Index of 3

3. A welder and procedure re-qualification would be required:

(a) When the run-out date of the procedure has been reached
(b) Every Year
(c) When changing from day to night shift work
(d) When there is a change in an essential variable

4. Tensile strength can be increased in steel by:

(a) Annealing
(b) Galvanizing
(c) Addition of carbon
(d) Casting

5. Which of the following always occurs in the parent material:

(a) Hydrogen cracks

(b) Laps and laminations
(c) Centerline cracks
(d) Porosity

6. To prevent the hardening and cracking of High Carbon Steel plate when flame cutting it is
advisable to:

(a) Pre-heat the plate

(b) Soak the plate in oil
(c) Cool the plate quickly after cutting
(d) Increase the cutting Oxygen pressure

7. Re-crystallization during annealing is used to make steel:

(a) Softer
(b) Harder
(c) Tougher
(d) Stronger

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8. You should always refer to a higher authority for guidance when:

(a) Cracks appear during welding

(b) The welder will not follow your instructions
(c) Instructions are missing in the specification or contract documents
(d) All of the above

9. Spatter may be finely controlled during MIG / MAG welding by:

(a) Adjusting the inductance control

(b) Using CO2 gas
(c) Increasing the arc voltage
(d) Welding with no gas

10. Fatigue testing is used to test welds:

(a) Under cyclic loading

(b) Under creep stress loading
(c) Under impact loading
(d) Under static loading

11. Argon + 2% Oxygen is used when welding:

(a) High carbon steels

(b) Austenitic stainless steels
(c) Aluminum
(d) Martensite stainless steels

12. In BS 639 and BS En 499 the first digits of the electrode classification indicate:

(a) Tensile and yield strength

(b) Toughness
(c) Electrode coating
(d) Electrode efficiency

13. Cellulosic coatings are generally used because of:

(a) Their low hydrogen content

(b) Their high penetration characteristic
(c) Their high-strength weld deposit
(d) Their high weld toughness values

14. Porosity would mostly occur in which of the following:

(a) When MMA welding semi de-oxidized steel

(b) When MIG / MAG welding fully de-oxidized steel
(c) When welding TIG welding non de-oxidized steel
(d) When Sub Arc Welding semi-killed steel

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15. When welds have a depth-to-width ratio of higher than 2:1 it is possible that:

(a) Centerline cracks may appear

(b) The fusion boundary will be outside the HAZ
(c) The HAZ will be too narrow
(d) The weld will be non-magnetic

16. On which of the following would you not use MPI inspection?

(a) A low carbon steel butt welded joint

(b) An Austenitic Stainless steel fillet welded T joint
(c) A medium carbon steel fillet welded lap joint
(d) All of the above

17. Increasing the arc energy input of a welded joint will:

(a) Increase the strength of the joint

(b) Increase the toughness of the joint
(c) Increase the grain size of the weld and HAZ
(d) Decrease the width of the HAZ

18. To BS 499 part 2, which of the following is true for a welding symbol:

(a) This or the arrow side of the joint goes on top of the reference line
(b) This or the arrow side of the joint goes below the reference line
(c) This or the arrow side of the joint goes in the middle of the reference line
(d) All of the above

19. Internal lack of fusion defects can be normally found by using:

(a) Penetrant testing

(b) Impact tests
(c) Side bend test
(d) Hardness test

20. Which of the following steel structures has the highest hardness:

(a) Martensite
(b) Austenitic
(c) Ferritic
(d) All have the same hardness

21. An IQI would be used in radiography to assess:

(a) Image quality

(b) Type of steel
(c) Density of graph
(d) Type of welding process used

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22. Poor penetration would be found in MIG / MAG welded steels when using:

(a) Argon + 20% CO2

(b) CO2
(c) Pure Argon
(d) Argon + 5% CO2

23. In which of the following steels are you most likely to find H2-induced weld metal cracking
after welding:

(a) Low-carbon steel

(b) High strength low alloy steel
(c) Austenitic stainless steels
(d) 1% Nickel steel

24. The main reason degreasing agents should always be dried from metals prior to welding, is
because they are likely to:

(a) Increase the arc voltage

(b) Produce hazardous fumes
(c) Slow down the welding speed
(d) Produce lack of fusion defects

25. Which of the following processes would be most prone to lack of fusion defects:

(a) Pulsed arc MIG

(b) Spray transfer MIG
(c) Dip transfer MIG
(d) Submerged arc

26. Adjusting the inductance control in dip transfer MIG / MAG welding, will control:

(a) The pulse rate

(b) The gas flow rate
(c) The amount of spatter
(d) The arc voltage

27. Which of the following is an inspection point in Sub Arc Welding?

(a) Flux mesh size

(b) Gas type
(c) Tungsten size
(d) Gas flow rate

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28. Why is Hot Pass so-called?

(a) Because it is applied to a high amperage

(b) Because it is applied when the root is still hot
(c) Because it could cause hot shortness
(d) Because it heat treats the root

29. The HAZ associated with a weld is:

(a) The melted portion of the parent plate

(b) The area immediately adjacent to the weld which has undergone a microstructural
change
(c) The weld area plus the parent plate which has undergone a microstructural change
(d) The are in the weld region with the lowest tensile strength

30. Cold lap is another term for:

(a) Lack of fusion

(b) Low amperage
(c) Undercut
(d) Hydrogen cracking

31. When a medium to high carbon steel is quenched:

(a) It becomes malleable

(b) Its hardness increases
(c) It becomes ductile
(d) The plasticity is increased

32. The TIG welding process utilizes an electrode that is:

(a) Cellulosic
(b) Non-consumable
(c) Consumable
(d) None of the above

33. Another name for Suck back in the root of a weld is:

(a) Concavity
(b) Convexity
(c) LORP
(d) Root undercut

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34. One of the advantages of a multi-pass MMA weld is that it generally produces a:

(a) High tensile strength

(b) High degree of ductility
(c) Coarse grain structure
(d) Fine grain structure

35. A Normalizing heat treatment process is carried out by:

(a) Heating the metal just above 650*C

(b) Taking the metal above the re-crystallization temperature and allowing to air cool
(c) Taking the metal above the re-crystallization temperature and allowing to furnace cool
(d) Taking the metal above the re-crystallization temperature and quickly cooling by
immersing

36. The extent of the changes in microstructure will depend on the following:

(a) Material composition

(b) Heat input
(c) The rate of cooling
(d) All of the above

37. Defects outside of the limits specified in a standard should always be:

(a) Repaired
(b) Reported to a “senior person”
(c) Radio graphed
(d) All of the above

38. Welding a single V butt with laminations showing on the side wall may give rise to:
(a) Lamellar tearing
(b) Solidification cracking
(c) Martensite
(d) Undercut

39. The likelihood of brittle fracture in steels will increase with:

(a) A large grain formation

(b) A reduction of in-service temperature to sub-zero levels
(c) Ferritic rather than austenitic steels
(d) All of the above

40. Which of the following discontinuities could be as a primary processing discontinuity often
found in cast material?

(a) Fatigue crack

(b) Stress corrosion crack
(c) Porosity
(d) Lack of penetration
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41. Which of the following discontinuities could be classified as a service-induced discontinuity?
(a) Fatigue crack
(b) Porosity
(c) Machining tear
(d) Lap

42. Which of the following contamination could affect the sensitivity of penetrant?

(a) Acid
(b) Water
(c) Salts
(d) All of the above

43. Which of the following is a discontinuity that might be found in a forging?

(a) Shrinkage cracks

(b) Laps
(c) Cold shuts
(d) Insufficient penetration

44. The prime purpose of the black light for fluorescent penetrant inspection:

(a) To magnify indications

(b) To make the indications visible
(c) To develop indications
(d) To speed up inspection

45. In accordance with BS 5135 which of the following is applicable for scale “C” with regards to
hydrogen content per 100g of deposited weld metal?

(a) > 15 ml
(b) > 15 ml < 25 ml
(c) > 10 ml < 15 ml
(d) > 5 ml < 10 ml

46. Which is the correct heat input if the amps are 350, volts 32 and travel speed 310 mm / s?

(a) 2.16 kJ / mm
(b) 0.036 kJ / mm
(c) 2160 kJ / mm
(d) 36 kJ / mm

47. In accordance with BS 5135 what is the minimum distance the preheat shall be applied from
the joint preparation?

(a) 100 mm
(b) 25 mm
(c) 75 mm
(d) Not specified

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48. In accordance with BS 5135 what is the recommended minimum time allowed for the pre heat
temperature to equalize?

(a) 2 Min for each 25 mm of parent material thickness

(b) 5 Min for each 25 mm of parent material thickness
(c) 2 Min for each 50 mm of parent material thickness
(d) 5 Min for each 50 mm of parent material thickness

49. Which of the following best describes the elastic limit?

(a) The resistance to fracture under impact loading

(b) The maximum stress to which a material can be subjected without permanent
deformation
(c) The amount of stress at which point the material will continue to elongate without an
increase in force applied
(d) The ability of the material to stretch and become permanently deformed without breaking
or cracking

50. In accordance with BS 2901 which of the following is classified as triple de-oxidized filler
wire?

(a) A 17 wire
(b) A 18 wire
(c) A 15 wire
(d) All of the above

51. In BS 639 an electrode classified as E51:

(a) Has an UTS value of 51,000 psi, minimum yield strength of 330 N/mm
(b) Has an UTS value of 430 to 550 N/mm, minimum yield strength of 360 N/mm
(c) Has an UTS value of 510 to 650 N/mm, minimum yield strength of 360 N/mm
(d) Has an UTS value of 510 to 650 N/mm, minimum yield strength of 330 N/mm

52. An E80 electrode would normally be classified in which standard:

(a) BS EN 499
(b) BS 639
(c) AWS A5.5
(d) AWS A5.1

53. What is an active flux?

(a) A material used to clean surfaces of the joint through continued chemical reaction
(b) A material used to protect the molten weld pool during welding
(c) A material used to aid fusion
(d) All of the above

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54. Which of the following is most likely to reduce the chances of arc blow?
(a) A change from ac current to dc current
(b) A change from dc current to ac current
(c) A change from dc electrode +ve to de electrode –ve
(d) A change from dc electrode –ve to dc electrode +ve

55. If a steel has a Ceq % of 0.48%:

(a) PWHT would always be necessary
(b) It will probably require a pre-heat temperature above 300*C prior to welding
(c) It will probably require a pre-heat temperature above 100*C prior to welding
(d) The heat-affected zone will be very tough

56. When welding a double V butt joint with SAW process the presence of centerline porosity may
be due to:
(a) Damp flux
(b) Contaminated joint preparation
(c) Incorrect stick out lengths
(d) All of the above

57. The HAZ associated with a fusion weld on steel has up to how many separate regions of micro
structure?
(a) 4
(b) 6
(c) 1
(d) 2

58. The possible effects of having a travel speed too fast:

(a) Low toughness, slag inclusions and undercut
(b) High hardness, slag inclusions and a narrow thin weld bead
(c) High hardness, excessive deposition and cold laps
(d) Low toughness, poor fusion and slag inclusions

59. Which of the following statements is true when using a flat characteristic power source?
(a) The electrode is always dc –ve
(b) The shielding is always pure argon
(c) The wire feed speed remains constant
(d) The electrode extension will have no effect on weld quality

60. Which of the following will vary the most, when varying the arc length?
(a) Voltage
(b) Amperage
(c) Polarity
(d) None of the above

61. Inherent rectification of the electrical output is produced in the arc when TIG welding using:
(a) AC with a suppressor
(b) AC without a suppressor
(c) DC with reverse polarity
(d) DC with straight polarity

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