Red Seal Welding Practice Exam

What classification does a 7018 electrode have?

1. Medium Hydrogen

2. Low Hydrogen

3. High Hydrogen

4. Variable Hydrogen

The correct answer is: Low Hydrogen

A 7018 electrode is a type of welding electrode used for low hydrogen welding. This means that the electrode has a low moisture content, which prevents hydrogen cracking and produces stronger welds. Options A, C, and D are incorrect because they do not accurately describe the classification of a 7018 electrode. A medium hydrogen electrode would have a higher moisture content, while a high hydrogen electrode would have an even higher moisture content, both of which could lead to weaker welds and potential cracking. A variable hydrogen electrode would have inconsistent levels of moisture, making it unreliable for consistent, strong welding.