Cswip mcqs 07

1. The melting rate of the wire in the GMAW, FCAW processes depends on?
A) Voltage per unit length
B) Shielding gas flow rate
C) Current density
D) Ampere per unit length of the wire
2. In a fillet weld fracture test, the specimen is broken with?
A) The fillet weld in tension
B) The fillet weld in compression
C) No specific method needs to be adopted
D) Suitable machining
3. Concerning a bend test which of the following would you say is NOT true?
A) A 4T bend is more severe than a 2T bend
B) The outer surface of the bend specimen is examined
C) It reveals defects like lack of fusion and porosity
D) It gives an indication of the ductility of the welded joint and weld metal
4. Ductile brittle transformation temperature of a welded specimen is affected by?
A) Material composition
B) Welding input
C) Pre and post weld heat treatments
D) All of the above
5. A double wall single image technique is generally used on pipes?
A) To inspect both walls on the same film
B) When the pipe diameter is over 100mm
C) To save time on pipe diameters less than 100mm
D) When a SWSI is required
6. In SAW normally DCEP is used, when is DCEN preferred?
A) For positional welding
B) For welding thicker plates
C) For fully automated welding
D) For surfacing applications
7. The deposition rate of the FCAW process is widely accepted as being?
A) Higher than the GMAW process
B) Lower than the GMAW process
C) The same as the GMAW process
D) Higher or lower depending on welding position
8. In a tensile specimen, the reduced section is made————?
A) For better gripping
B) So that the failure takes place in that region
C) To suit testing convenience
D) So that calculating the tensile strength is easier
9. Arc blow can be reduced or eliminated by?
A) Relocating the earth connection
B) Welding towards a heavy tack
C) Changing to AC
D) All of the above
10. The “pinch effect” is useful in?
A) Controlling the penetration
B) Detaching the molten droplet from electrode
C) Controlling the bead width
D) Increasing the deposition rate
11. HV10 is related to which of the following surveys?
A) Vickers hardness test
B) Rockwell hardness test
C) Brinell hardness test
D) Flux hardness test
12. A nick break test reveals defects in the?
A) Heat affected zone
B) The weld metal
C) The parent metal
D) All of the above
13. Thoriated tungsten electrodes have the major disadvantage of?
A) Being very costly
B) Being radioactive in nature
C) Having lower melting points
D) Being scarcely available
14. In a SAW process, before starting the welding you observe that the WPS is made
with an agglomerated flux but they would now like to use a fused flux. The
classification for both is the same though both have been tested under different
parameters and conditions. In such a case you will?
A) Permit the welding to proceed since the classification is same
B) Insist on using the same type approved by the WPS
C) Try to quality the process with a new WPS
D) Inform their management when you have time and await their advice
15. In tensile test which of the following is true?
A) All materials show a distinct upper and lower yield point
B) UTS is always lower than the yield strength
C) Gauge length is used to measure the percentage elongation
D) Gauge length is used to calculate the reduction in area
16. Metal powder additions to increase deposition efficiencies are used in which
welding processes?
17. Considering the shielding gases argon, helium and carbon dioxide for the GMAW
process, which of following is NOT true?
A) They can all produce spray transfer
B) They are always suitable for all position welding
C) They all produce heavy spatter in DC+
D) All of the above
18. In a narrow gap SAW which of the following is not true?
A) It uses a special welding head
B) It requires special fluxes
C) Operates only with two wires
D) Is used for thicker plates
19. In a twin wire SAW process:
A) One wire uses AC and another uses DC
B) Both wires use different currents
C) Both wires pass through the same contact point
D) Two saw welding heads are used
20. In GMAW, if an internal inclusions is observed, most likely it will be a____?
A) Slag inclusions
B) Tungsten inclusions
C) Copper inclusions
D) Silica inclusions
21. Elements like sulphur, phosphorus are kept very low in weld metal because:
A) They increase the hardness of the weld
B) They increase the ductility of the weld
C) They increase the chance for solidification cracking
D) They have no effect what so ever
22. In plain carbon steels which of the following has the greatest effect on the
material hardness:
A) Carbon
B) Molybdenum
C) Silicon
D) Manganese
23. Weld decay begins to occur:
A) Immediately after welding
B) After post weld heat treatment
C) Faster in low carbon grades
D) Slower in low carbon grades
24. The final documentation after welding should contain which of the following
A) Material test certificates
B) Inspection test reports
C) As built drawings
D) All of the above
25. Before starting to weld with a LH type electrode, you find out that the baking oven
on the shop floor is not operating. The electrodes are heated by short-circuiting
them on the plate. In such a situation, your action will be?
A) To stop the welding until the oven is operating and the electrodes are baked correctly
B) To proceed with the welding using the above technique to save time until the oven is
C) To report to the management when you have time and a their advice
D) To suggest using an alternate electrode
26. In MMA when the arc length is increased which of the following is true?
A) The arc voltage increase
B) The level of spatter increases
C) In can lead to porosity
D) All of the above
27. In SAW electrode extension refers to the distance between?
A) The contact tip to the electrode tip
B) The length of electrode inside the flux
C) The length of the electrode outside the flux
D) The width of the contact tip
28. Which of the following is an advantage of MMA welding?
A) Extensive slag cleaning procedures are required
B) The quality is heavily dependent on the skill of the welder
C) Accessibility in difficult areas
D) It easy to control the molten pool
29. In order to reduce the chances of HIC in low alloy steels, it is a recommended
practice to?
A) Chill the weld metal by air blast
B) Use 6010 electrodes
C) Welding with a maximum pre heat of 1000C
D) Post heat the weld
30. For HIC to occur, it can be said that the higher the tensile strength of the weld
A) The lower the diffusible hydrogen required for this occur
B) The higher the diffusible hydrogen required for this occur
C) The amount of diffusible hydrogen has no bearing on HIC
D) The preheat would have to be increased for HIC to occur
31. The surface finish of the charpy impact specimen is?
A) Rough
B) Smooth and surface
C) Turned in lathe
D) Surface finish is not important
32. Weld decay is also known as?
A) Galvanic corrosion
B) Galvanic erosion
C) Inter-granular-erosion
D) Inter-granular-corrosion
33. Which type of weld is not a butt weld type?
A) View A
B) View B
C) View C
D) View D
34. A medium carbon steel weld should be inspected?
A) As soon as it is safe to do so
B) When the welder is finished
C) 48 hours after completion
D) After NDT examination
35. When a PWHT is conducted after welding, which of the following aspects require
A) Heating rate
B) Soaking time & temperature
C) Cooling rate
D) All of the above
36. During visual inspection, magnification is sometimes used, what is the maximum
A) 5-10 times
B) 2-5 times
C) 4-6 times
D) The more magnification the better
37. In relation to HIC, which of the following statements is NOT true?
A) It occurs immediately after welding
B) Cellulosic electrodes are ideal to avoid HIC
C) Pre heating will increase the chances of HIC
D) All of the above
38. The preheat temperature is?
A) The temperature above which no welding should take place
B) The temperature below which welding can take place
C) The minimum temperature above which welding can take place
D) The temperature at which steel solidifies during welding
39. An approved WPS indicates a preheat requirement of 2500C for a particular job.
This means that:
A) The job should be heated once to this temperature and then allowed to cool before
B) The job should be preheated to this temperature before you start welding
C) The job should be preheated every 3-5 weld runs per convenience and then allowed
to cool
D) All of the above
40. The advantages of MPT over DPT are?
A) Inspection of the component is generally quicker
B) It is suitable for all materials
C) Electrical power is never necessary
D) De-magnetization
41. With regards to lamellar tearing, a buttering layer will?
A) Improve ductility
B) Disperse heat
C) Improve toughness
D) Improve hardness
42. Hydrogen cracking is most likely to be found in which welding process?
43. Hydrogen cracking can occur where?
A) In the weld
B) In the HAZ
C) Transverse to the weld
D) All of the above
44. Normally, while carrying out face bend testing which of the following is true?
A) The faces is in compression
B) The face must be 6T
C) The root is in compression
D) Both b and c
45. Prior to commencing production welding using the MAG (GMAW) you notice the
earth clamp is in very poor condition, what would you do?
A) Nothing
B) Insists the welder have it replaced before commencing welding
C) It will not affect the welding so wait until it eventually melts off then have it replaced
D) It will OK for welding but ensure that nobody touches it because they may get burnt
46. Which one of the symbols below is correct for a steep flanged single-V butt joint?
A) View A
B) View B
C) View C
D) View D
47. Who is responsible for site safety?
A) Site engineer
B) Welding supervisor
C) An approved inspector
D) Everyone
48. The term OCV means?
A) On current voltage
B) Open current voltage
C) Open circuit voltage
D) Ordinary current voltage
49. What is the maximum OCV allowable to initiate an arc using AC current?
A) 1000V
B) 10V
C) 90V
D) 900V
50. Which of the following statements is true?
A) Penetrant testing cannot be continually repeated on the same component
B) Magnetic particle testing only works on austenitic stainless steel
C) Radiography cannot reveal volumetric defects
D) Ultrasonic testing cannot reveal planar defects perpendicular to the beam direction
51. Post inspection cleaning of further treatment of components is not required in
which of the following NDT methods?
52. A standard radiographic film test cannot adequately detect:
A) Porosity in the weld volume
B) Slag inclusions in a weld
C) Laminations in rolled plate adjacent to the weld
D) Lack of root penetration in a weld
53. Loss of ductility is often one of the reasons for a hydrogen crack to occur. What
will happen to ductility we increase tensile strength?
A) Ductility will be greater
B) Ductility will not change
C) Ductility will be less
D) Ductility is not affected by tensile strength
54. Sulphur and copper are elements that can make steel weld metal sensitive to
solidification cracking if they are present in the weld at relatively high levels.
Sulphur contamination may lead to the formation of?
A) Iron sulphides that remain liquid when the bead has cooled as low as ~1100oC
B) Iron sulphides that remain liquid when the bead has cooled as low as ~1400oC
C) Iron sulphides that remain liquid when the bead has cooled as low as ~980oC
D) Iron sulphides that remain liquid when the bead has cooled as low as ~900oC
55. What is a WPS?
A) A written document or verbal instruction that provides direction to the welder or
welding operator for making production welds in accordance with code requirements
B) A written document that provides direction to the welder or welding operator for
making production welds in accordance with code requirements
C) A record of what occurred during of the test coupon and result of testing of the
D) All of the above

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