What safety precaution must be taken when welding on containers that prevlously held combustible materials? A. Weld quickly to minimize heat exposure B. Use only low amperage settings C. Clean and formally verify safety or use inerting process D. Keep a fire extinguisher nearby only

## Step 1<br />The problem is asking us to identify the correct safety precaution to take when welding on containers that previously held combustible materials. The options provided are:<br />A. Weld quickly to minimize heat exposure<br />B. Use only low amperage settings<br />C. Clean and formally verify safety or use inerting process<br />D. Keep a fire extinguisher nearby only<br /><br />## Step 2<br />We need to evaluate each option based on its effectiveness in ensuring safety during welding on containers that previously held combustible materials.<br /><br />## Step 3<br />Option A suggests welding quickly to minimize heat exposure. However, this does not address the potential risk of igniting the combustible materials in the container.<br /><br />## Step 4<br />Option B suggests using only low amperage settings. While this may reduce the heat generated, it does not eliminate the risk of igniting the combustible materials.<br /><br />## Step 5<br />Option C suggests cleaning and formally verifying safety or using an inerting process. This is a comprehensive safety measure that involves cleaning the container to remove any residual combustible materials and verifying the safety of the welding process. This is the most effective safety precaution among the options provided.<br /><br />## Step 6<br />Option D suggests keeping a fire extinguisher nearby only. While this is a good safety measure, it does not address the potential risk of igniting the combustible materials in the container.