When accomplishing welding repairs using the electric arc welding process, what statement is true concerning the characteristics of a good quality weld when welding a single-V butt joint?

Correct Answer: Option C — There should be penetration at the sides of the weld, and there should be penetration between passes.

Proper fusion in a single-V butt joint requires complete penetration at the root and sidewalls to ensure structural integrity. Lack of penetration creates stress risers and potential failure points. Consistent penetration between weld passes is equally critical to prevent slag inclusions and ensure the weld metal fuses into a monolithic, homogeneous structure.