For a given size weld, the theoretical throat for a concave fillet weld is the same as which of the following?

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Multiple Choice

For a given size weld, the theoretical throat for a concave fillet weld is the same as which of the following?

Explanation:
For a fillet weld, the theoretical throat is a geometric distance defined by the weld size (the leg length) and the joint legs. This distance comes from the 45-degree throat line across the right-angle junction, so it is fixed for a given weld size. Whether the bead is concave or convex doesn’t change this geometric relationship, so the theoretical throat remains the same as for a convex fillet weld. The difference between concave and convex affects the surface contour, not the cross-sectional throat that governs the weld’s theoretical throat.

For a fillet weld, the theoretical throat is a geometric distance defined by the weld size (the leg length) and the joint legs. This distance comes from the 45-degree throat line across the right-angle junction, so it is fixed for a given weld size. Whether the bead is concave or convex doesn’t change this geometric relationship, so the theoretical throat remains the same as for a convex fillet weld. The difference between concave and convex affects the surface contour, not the cross-sectional throat that governs the weld’s theoretical throat.

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