Which statement best describes the root pass?

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Multiple Choice

Which statement best describes the root pass?

Explanation:
In welding, the root pass is the initial weld placed to fuse the base metals at the root of the joint and establish the seam between the parts. This first pass penetrates into the root and creates a sound foundation, ensuring the joint is properly aligned and fused before any additional material is added. Subsequent passes then build up the weld—filler passes add material to reach the full thickness, and the final cap pass covers and smooths the weld surface. The root pass is not the final pass that caps the weld, nor is it simply the filler layer, and reinforcement is extra material added on top after finishing.

In welding, the root pass is the initial weld placed to fuse the base metals at the root of the joint and establish the seam between the parts. This first pass penetrates into the root and creates a sound foundation, ensuring the joint is properly aligned and fused before any additional material is added. Subsequent passes then build up the weld—filler passes add material to reach the full thickness, and the final cap pass covers and smooths the weld surface. The root pass is not the final pass that caps the weld, nor is it simply the filler layer, and reinforcement is extra material added on top after finishing.

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