Question 250Steam Plants - 1st Asst/Chief

The correct answer is B) Backing out tool. A backing out tool is specifically designed to remove boiler tubes from the boiler header. It works by being inserted into the end of the boiler tube and engaging the internal threads, allowing the tube to be unscrewed and extracted from the header. This tool is the proper and recommended method for removing boiler tubes, as it minimizes the risk of damage to the tube or header. The other options are not appropriate for this task. A swaging tool is used to expand the end of a tube to fit into a fitting, a laminating tool is used for fiberglass layup, and an expanding tool is used to mechanically expand the diameter of a tube, but none of these are suitable for safely removing a boiler tube from its header.