Welder Red Seal · Question
During a visual inspection of a multi-pass groove weld, the inspector notes that the fusion line between the deposited filler metal and the base metal, or between adjacent weld beads, is not continuous along the entire length. This suggests a lack of coalescence. What is this weld discontinuity commonly referred to as?
Incomplete fusion, also known as lack of fusion, describes a condition where there is a failure of the weld metal to fuse completely with the base metal or with
Start free practice for Welder Red Seal
154 questions · no signup required · 40 free questions per day
Question: During a visual inspection of a multi-pass groove weld, the inspector notes that the fusion line between the deposited filler metal and the base metal, or between adjacent weld beads, is not continuous along the entire length. This suggests a lack of coalescence. What is this weld discontinuity commonly referred to as?
Answer options: ✅ Incomplete fusion
- Lack of penetration
- Undercut
- Overlap
Correct answer: Incomplete fusion
Explanation: Incomplete fusion, also known as lack of fusion, describes a condition where there is a failure of the weld metal to fuse completely with the base metal or with a previous weld bead. Lack of penetration is specific to the joint root failing to be filled. Undercut is a groove in the base metal, and overlap is weld metal extending beyond the fusion boundary without fusing.
Start free practice for Welder Red Seal
154 questions · no signup required · 40 free questions per day
More about Welder Red Seal
Related Questions
- A welder is fabricating a pressure vessel component using FCAW-G with an E70T-1 wire. The procedure specifies
- A welder is preparing to weld 20 mm (0.8 in) thick high-strength low-alloy (HSLA) steel using FCAW-G. The weld
- A structural steel fabricator is using FCAW-S (E71T-8 wire) to weld heavy sections of structural steel in an o
- When performing FCAW-G (gas-shielded flux-cored arc welding), a welder notices the arc is unstable and the wir
- A structural welder is performing overhead FCAW-G on 12 mm (0.5 in) thick steel with an E71T-1 wire. The weld
- A welder is setting up an FCAW-S machine for welding in a remote location without access to external shielding
More for Welder Red Seal candidates
Practice tests
Question explanations
- A welder is fabricating a pressure vessel component using FCAW-G with an E70T-1 wire. The procedure specifies
- A welder is preparing to weld 20 mm (0.8 in) thick high-strength low-alloy (HSLA) steel using FCAW-G. The weld
- A structural steel fabricator is using FCAW-S (E71T-8 wire) to weld heavy sections of structural steel in an o
- When performing FCAW-G (gas-shielded flux-cored arc welding), a welder notices the arc is unstable and the wir
Ready to practice?
Free, no signup required. Build a wrong-question list as you go.
Start Free Welder Red Seal Practice →Related courses
Other Canadian certifications candidates often prepare for alongside this one.