CRI Welding Processes & Techniques 3 — Questions and Answers
Question 1: What radiographic indication would most likely result from a weld made with excessive travel speed in GMAW?
- Overlap
- Incomplete fusion (Correct answer)
- Undercut
- Excessive reinforcement
Correct answer: Incomplete fusion
Excessive travel speed reduces heat input, leading to inadequate melting of the base metal and resulting in incomplete fusion between weld passes or at the fusion line.
Question 2: Which AWS welding symbol element indicates the size of a fillet weld?
- Number to the right of the weld symbol
- Number to the left of the weld symbol (Correct answer)
- Letter above the reference line
- Tail annotation
Correct answer: Number to the left of the weld symbol
The fillet weld size is placed to the left of the fillet weld symbol on the welding symbol, indicating the leg size.
Question 3: Electroslag Welding (ESW) is primarily used for welding which of the following?
- Thin sheet metal in all positions
- Thick plates in the vertical position (Correct answer)
- Pipe root passes
- Overhead structural members
Correct answer: Thick plates in the vertical position
ESW is designed for welding thick plates (typically over 1 inch) in a single pass in the vertical position, making it efficient for heavy structural applications.
Question 4: What is the term for the unmelted base metal region adjacent to the fusion zone that has been altered by the heat of welding?
- Fusion zone
- Heat-affected zone (HAZ) (Correct answer)
- Weld metal
- Root zone
Correct answer: Heat-affected zone (HAZ)
The Heat-Affected Zone (HAZ) is the region of base metal not melted during welding but whose microstructure and properties have been altered by the welding heat.
Question 5: In resistance spot welding, what primarily causes the formation of a weld nugget?
- External flame heating
- Resistance heating at the faying surfaces (Correct answer)
- Induction heating
- Arc discharge between electrodes
Correct answer: Resistance heating at the faying surfaces
In resistance spot welding, electrical current passing through the resistance at the faying surfaces generates heat that melts the metal and forms the weld nugget.
Question 6: Which groove weld joint configuration allows access for welding from only one side and is commonly used when back-side access is restricted?
- Double-V groove
- Single-V groove with backing (Correct answer)
- Double-U groove
- J-groove from both sides
Correct answer: Single-V groove with backing
A single-V groove weld with backing (permanent or temporary backing bar) allows full penetration from one side when back-side access is not possible.
Question 7: What welding position designation is used when the weld axis is horizontal and the weld face lies in a vertical plane?
- 1G (flat)
- 2G (horizontal) (Correct answer)
- 3G (vertical)
- 4G (overhead)
Correct answer: 2G (horizontal)
The 2G position is the horizontal groove weld position where the weld axis is horizontal and the weld face is in a vertical plane.
CRI Welding Processes & Techniques 3
What radiographic indication would most likely result from a weld made with excessive travel speed in GMAW?