Visual Testing (VT) Practice Exam

For a concave fillet weld to be acceptable, the actual leg dimension must be:

1. Longer than the size.

2. Shorter than the size.

3. Equal to the size.

4. Equal to the throat.

The correct answer is: Longer than the size.

For a concave fillet weld to be acceptable, the actual leg dimension must be longer than the specified size. This requirement stems from the geometry of a concave fillet weld, where the weld's legs extend into the base materials. If the leg dimension were shorter than the specified size, it would compromise the integrity and strength of the weld, potentially leading to a failure in load-bearing applications. It is important to ensure that the weld not only meets size specifications but also maintains the necessary thickness to provide adequate joint strength. The criteria for welding quality often emphasize that actual dimensions should meet or exceed minimum requirements to ensure reliability and safety in the finished product. Thus, having a leg dimension that is longer than the specified size is key to maintaining the weld’s performance and structural integrity. The other options do not align with this requirement; a shorter leg dimension would weaken the weld, while equating dimensions to either size or throat does not address the necessary excess in actual leg length needed for a concave fillet weld.