Q 1: D
Section 4.1.3, impact toughness test.
Q 2: B
Section 4.1.6 and figure 4.16, side bend test.
Q 3: A
Section 6.3, welder qualification to make a sound weld, defect free.
Q 4: B
Section 2.3, “toe” definitions, and figure 6.31 – concave fillet weld.
Q 5: C
Root bead penetration mainly influenced by root gap.
Q 6: D
Section 3.6.1, undercut sharpness due to high travel speed, high welding current, lowest heat input gives to high hardness.
Section 10.3 heat input determine.
Q 7: A
Hardness test is another NDT method.
Root beads made with low amperage and voltage to control penetration; it may not occur tungsten inclusion.
Q 8: D
Section 2.6.2 shape of fillet welds, throat thickness.
Q 9: D
Section 1.1, basic requirements for visual inspection.
Q 10: A
Section 1.1.5, duties of welding inspector.
Q 11: D
Incomplete root penetration means fusion face of root are not melted, see Figure 3.18.
“Excessive root gap given more root penetration or excess penetration”.
Q 12: A
Incomplete root fusion or lack of root fusion, one fusion face of root is not melted, see Figure 3.16.
- Answer B, root gap to large give more penetration.
- Answer C, root face being too small easy to melt the root edge.
- Answer D, Amperage too high given more penetration.
Q 13: D
“flaws” is other name of defects, most using in API specification.
Keyword “the most serious” mean the most of project specification are not accepted the defect like surface planer defect, crack, …
- Answer A, B, C may be accepted if these imperfections are allowed by Acceptance Criteria, see An Acceptance Levels at page 595 or Appendix A2-36.
- Arc strikes are not permitted for plate/pipe and macro.
- An arc strike is a type of crack, can produce a hard HAZ, lead to serious cracking in-service.
- Better to grind out and then MPI for surface detection.
Q 14: C
See Section 3.6.10 or Figure 3.28.
Root gap too large or high welding current may occur burn-through defect.
Q 15: B
Answer A, not correct at “quality only”.
Answer C, not correct, specification not only for “finished product”.
Answer D, not correct, code of practices may be standard, recommend practices (RP), or procedures, …
Q 16: A
Solid inclusion such flux, oxide, tungsten, slag trapped in the weld metal.
See Section 3.4.
Q 17: A
Planar imperfection such lamination, crack, lack of fusion (sidewall, root, inter-run, cap).
Slag / porosity is a non-planar defect.
Q 18: B
Throat thickness (actual) is extremely hard to measure, it will calculate by 1.141 times leg length. It may check in the macro sample.
Q 19: C
Face tension --> face bend
Root tension --> root bend
Side tension --> face bend
Q 20: C
Key works “heavy porosity, MMA, site, is most likely” are considered moisture contents.
Q 21: A
MIG and MAG welding process use a solid wire welding consumable, defect not included slag.
MMA, slag produce from covered electrode, for weld pool protection from atmosphere, it may trap in the weld metal.
Q 22: A
Key word “main cause, undercut is”, best answer is excessive amps or high welding current.
Other cause may be high travel speed.
Q 23: B
Key words “is most likely, continuous monitoring”, best answer is B for pipe welder.
Q 24: A
Key words “strongest, fillet welds”, which one given thicker of throat thickness.
See Section 2.6.1.
Q 25: B
Keywords “included angle, full penetration, pipe butt joint, MMA”, best practice is 70 degree.
See Section 2.4.1 and Figure 2.11.
Q 26: C
Answer: 8 – 7*0.7 = 3.1 mm in throat thickness.
See Figure 2.28.
Q 27: A
Fusion boundary or fusion line see Figure 2.8 or Figure 2.9.
Q 28: B
Keyword “not allowed by the application standard” means defects, defect is not allowed.
See Section 3.1, or acceptance level sheet in appendix A2-36.
Q 29: B
Keyword “a magnifying glass” and see Section 1.1.4, appendix 5.
Q 30: D
See Section 6.3 and Section 6.3.2.
Q 31: C
Common occur SAW process because high current, DC EP polarity.
Reduce arc blow by change DC to AC power source.
Q 32: A
E6013/E7016 classified in AWS A5.1.
E 51 33 B, number “51” is min. yield strength and “33” is min. absorbed energy is not classified in ISO 2560.
See Figure 16.3.
Q 33: B
Keyword “stovepipe” or “country pipeline”, root bead made by Cellulosic electrode, downhill position (PF).
See Section 11.3.5.
Q 34: A
See Section 11.3.5 and Table 16.1.
Q 35: B
Max. weld bead > low travel speed > high heat input > low toughness.
See Figure 2.38 – weave bead, Section 10.3 – heat input influence.
Note: Heat input / arc energy major influence on the travel speed.
Q 36: C
Filler rods/cored wire/sticks of MMA electrode is a general of low-quality rimming steel.
See Section 16.1.
Q 37: B
Keyword “slope-out”, also learning slope-up.
See Section 12.4 and 12.5.
Q 38: C
Keyword “manual welding, power source or drooping characteristic”.
See Section 10.5.1 and Figure 10.1.
Q 39: D
Keyword “penetration, controlled”.
See Section 10.3.1.
Q 40: C
Keyword “purged with Ag, backing gas” for purpose avoid excessive oxidation or control root bead.
See Section 12.2.6.
Q 41: B
Filler rods/cored wire/sticks of MMA electrode is a general of low-quality rimming steel, refer Question 36 of this part.
The coating contains many elements and compounds.
See Section 16.1.
Q 42: A
See Section 16.1.
Q 43: B
See Section 16.4
Q 44: C
Keyword “AWS A2.4, other side”, see Section 9.12.
Q 45: D
Keyword “low hydrogen or hydrogen scale”.
See Section 11.3.5 and Section 17.3.3, or EN 1011-2.
Q 46: A
Keyword “hydrogen control”, see Figure 16.3 (letter H5) is a max. scale of hydrogen. See Annex C2 of EN 1011-2.
Q 47: C
Keyword “weld toes to be smoothly blended on the other side”,
Other side shall be placed on the dash-line.
See Section 9.4 and 9.8.
Q 48: D
Heat input and arc energy, see Section 10.3.
Q 49: C
Keyword “creep resistance”, See Section 7.3.
Q 50: A
Accessing quality of weld, or quality of joint.
See Section 4 and Section 4.1.7.
Section 4.1.3, impact toughness test.
Q 2: B
Section 4.1.6 and figure 4.16, side bend test.
Q 3: A
Section 6.3, welder qualification to make a sound weld, defect free.
Q 4: B
Section 2.3, “toe” definitions, and figure 6.31 – concave fillet weld.
Q 5: C
Root bead penetration mainly influenced by root gap.
Q 6: D
Section 3.6.1, undercut sharpness due to high travel speed, high welding current, lowest heat input gives to high hardness.
Section 10.3 heat input determine.
Q 7: A
Hardness test is another NDT method.
Root beads made with low amperage and voltage to control penetration; it may not occur tungsten inclusion.
Q 8: D
Section 2.6.2 shape of fillet welds, throat thickness.
Q 9: D
Section 1.1, basic requirements for visual inspection.
Q 10: A
Section 1.1.5, duties of welding inspector.
Q 11: D
Incomplete root penetration means fusion face of root are not melted, see Figure 3.18.
“Excessive root gap given more root penetration or excess penetration”.
Q 12: A
Incomplete root fusion or lack of root fusion, one fusion face of root is not melted, see Figure 3.16.
- Answer B, root gap to large give more penetration.
- Answer C, root face being too small easy to melt the root edge.
- Answer D, Amperage too high given more penetration.
Q 13: D
“flaws” is other name of defects, most using in API specification.
Keyword “the most serious” mean the most of project specification are not accepted the defect like surface planer defect, crack, …
- Answer A, B, C may be accepted if these imperfections are allowed by Acceptance Criteria, see An Acceptance Levels at page 595 or Appendix A2-36.
- Arc strikes are not permitted for plate/pipe and macro.
- An arc strike is a type of crack, can produce a hard HAZ, lead to serious cracking in-service.
- Better to grind out and then MPI for surface detection.
Q 14: C
See Section 3.6.10 or Figure 3.28.
Root gap too large or high welding current may occur burn-through defect.
Q 15: B
Answer A, not correct at “quality only”.
Answer C, not correct, specification not only for “finished product”.
Answer D, not correct, code of practices may be standard, recommend practices (RP), or procedures, …
Q 16: A
Solid inclusion such flux, oxide, tungsten, slag trapped in the weld metal.
See Section 3.4.
Q 17: A
Planar imperfection such lamination, crack, lack of fusion (sidewall, root, inter-run, cap).
Slag / porosity is a non-planar defect.
Q 18: B
Throat thickness (actual) is extremely hard to measure, it will calculate by 1.141 times leg length. It may check in the macro sample.
Q 19: C
Face tension --> face bend
Root tension --> root bend
Side tension --> face bend
Q 20: C
Key works “heavy porosity, MMA, site, is most likely” are considered moisture contents.
Q 21: A
MIG and MAG welding process use a solid wire welding consumable, defect not included slag.
MMA, slag produce from covered electrode, for weld pool protection from atmosphere, it may trap in the weld metal.
Q 22: A
Key word “main cause, undercut is”, best answer is excessive amps or high welding current.
Other cause may be high travel speed.
Q 23: B
Key words “is most likely, continuous monitoring”, best answer is B for pipe welder.
Q 24: A
Key words “strongest, fillet welds”, which one given thicker of throat thickness.
See Section 2.6.1.
Q 25: B
Keywords “included angle, full penetration, pipe butt joint, MMA”, best practice is 70 degree.
See Section 2.4.1 and Figure 2.11.
Q 26: C
Answer: 8 – 7*0.7 = 3.1 mm in throat thickness.
See Figure 2.28.
Q 27: A
Fusion boundary or fusion line see Figure 2.8 or Figure 2.9.
Q 28: B
Keyword “not allowed by the application standard” means defects, defect is not allowed.
See Section 3.1, or acceptance level sheet in appendix A2-36.
Q 29: B
Keyword “a magnifying glass” and see Section 1.1.4, appendix 5.
Q 30: D
See Section 6.3 and Section 6.3.2.
Q 31: C
Common occur SAW process because high current, DC EP polarity.
Reduce arc blow by change DC to AC power source.
Q 32: A
E6013/E7016 classified in AWS A5.1.
E 51 33 B, number “51” is min. yield strength and “33” is min. absorbed energy is not classified in ISO 2560.
See Figure 16.3.
Q 33: B
Keyword “stovepipe” or “country pipeline”, root bead made by Cellulosic electrode, downhill position (PF).
See Section 11.3.5.
Q 34: A
See Section 11.3.5 and Table 16.1.
Q 35: B
Max. weld bead > low travel speed > high heat input > low toughness.
See Figure 2.38 – weave bead, Section 10.3 – heat input influence.
Note: Heat input / arc energy major influence on the travel speed.
Q 36: C
Filler rods/cored wire/sticks of MMA electrode is a general of low-quality rimming steel.
See Section 16.1.
Q 37: B
Keyword “slope-out”, also learning slope-up.
See Section 12.4 and 12.5.
Q 38: C
Keyword “manual welding, power source or drooping characteristic”.
See Section 10.5.1 and Figure 10.1.
Q 39: D
Keyword “penetration, controlled”.
See Section 10.3.1.
Q 40: C
Keyword “purged with Ag, backing gas” for purpose avoid excessive oxidation or control root bead.
See Section 12.2.6.
Q 41: B
Filler rods/cored wire/sticks of MMA electrode is a general of low-quality rimming steel, refer Question 36 of this part.
The coating contains many elements and compounds.
See Section 16.1.
Q 42: A
See Section 16.1.
Q 43: B
See Section 16.4
Q 44: C
Keyword “AWS A2.4, other side”, see Section 9.12.
Q 45: D
Keyword “low hydrogen or hydrogen scale”.
See Section 11.3.5 and Section 17.3.3, or EN 1011-2.
Q 46: A
Keyword “hydrogen control”, see Figure 16.3 (letter H5) is a max. scale of hydrogen. See Annex C2 of EN 1011-2.
Q 47: C
Keyword “weld toes to be smoothly blended on the other side”,
Other side shall be placed on the dash-line.
See Section 9.4 and 9.8.
Q 48: D
Heat input and arc energy, see Section 10.3.
Q 49: C
Keyword “creep resistance”, See Section 7.3.
Q 50: A
Accessing quality of weld, or quality of joint.
See Section 4 and Section 4.1.7.
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