What is the consequence of having a cracked steel wheel that has been welded and repaired?

The consequence of having a cracked steel wheel that has been welded and repaired is that it will fail if any part of the wheel is rewelded. This is due to the fact that welding a cracked wheel can compromise the structural integrity of the wheel. Cracks in steel wheels indicate a propensity to fail under stress, and any repair through welding does not guarantee that the wheel can safely handle the loads and stresses it will encounter during operation.

Regulations for vehicle safety inspections typically designate a welded wheel as unfit for use. This is because the heat from welding alters the properties of the steel, which can lead to a higher likelihood of failure. Therefore, any attempt to repair the wheel through welding causes it to automatically fail inspection protocols, reinforcing the necessity for using wheels that are free from cracks and not previously welded.

In contrast, the other options suggest circumstances under which a welded wheel might pass inspection, which is not in line with safety standards. It's critical to ensure that all vehicle components, particularly those involved in bearing loads like wheels, are in optimal condition for safe operation.