Class 5 Boiler Practice Exam 2026 - Free Boiler Certification Practice Questions and Study Guide

A Class VI welder must be supervised by a Class IV or V welder because of the skill and experience level required in the welding field. Class IV and V welders are more advanced in their training and competency, enabling them to provide guidance and oversight to less experienced welders. This supervision is critical to ensure that proper welding techniques and safety practices are followed, which is especially important in maintaining the integrity of welds in various applications.

Those above the Class VI level not only have increased skills but also a better understanding of codes, standards, and specifications that govern welding practices. This is essential for ensuring that the work performed by a Class VI welder meets the necessary quality and safety standards typically expected in a professional setting.