Final answer:
In socket weld joints, a 1/16 inch gap is maintained at the base of the joint to accommodate metal expansion during welding, preventing fusion and stress-related issues.
Step-by-step explanation:
When fitting up a socket weld joint, the male end is welded in the female socket with a 1/16 inch gap at the base of the joint. This gap is essential as it allows for the expansion of the metal when it is heated during the welding process.
If the gap is not maintained, it can lead to issues such as improper fusion, excessive stresses, and potential cracking of the weld over time.