When repairing a refrigeration system, a swaging tool set would be used to carry out which of the following operations?

Correct Answer: Option A — Swaging tools can be used to expand an end of one tube to fit onto a tube of the same original outside diameter.

A swaging tool expands the end of a copper tube's inside diameter so that another piece of tubing of the exact same original outside diameter can slip inside to form a proper soldered or brazed joint.