Question

identify where to place the fourth pass for this 2g weld.

bead c
bead b
bead e
bead d
bead f
bead a

Explanation:

Analyze the 2G weld joint geometry

Using the Horizontal Groove Welding knowledge point, we identify that the image shows a multi-pass groove weld in the horizontal (2G) position. In a 2G groove weld, gravity pulls the molten weld pool downward, requiring a specific sequence of weld beads to properly fill the joint without sagging or creating defects.

Determine the multi-pass sequence

Using the 2G Weld Sequence knowledge point

• Pass 1 (Root Pass): Bead A is placed at the root of the joint.
• Passes 2 & 3 (Fill Passes): Bead B is placed on the upper side of the groove, and Bead E is placed on the lower side to support the next layer.
• Passes 4, 5 & 6 (Cover Passes): The cover layer starts from the bottom to build a shelf for subsequent beads. Therefore, the fourth pass is placed at the bottom of the joint, which is Bead F. Bead C and Bead D follow to complete the cover layer.

Answer:

• Bead C
• Bead B
• Bead E
• Bead D
• Bead F (Correct answer)
• Bead A