AG Mechanics CDE Practice Exam 2025 - Free AG Mechanics Practice Questions and Study Guide

In welding, when making several passes during the welding process, the first pass made in a joint is called the root pass. The root pass is typically the first pass made to establish the foundation of the weld joint. It is crucial because it ensures proper penetration and fusion between the base metals being joined.

Option A, the cap pass, is not the correct answer in this context. The cap pass is the final pass made on the weld joint to provide reinforcement and a finished appearance to the weld.

Option B, cover pass, is also not the correct term for the first pass in a joint. The cover pass is a subsequent pass made to cover the weld and provide additional reinforcement.

Option D, secondary pass, is not the term used to describe the first pass in a joint during welding. The secondary pass would refer to a pass made after the root pass but before the final cap pass.