Which welding technique is characterized by a higher energy input?

The weaving technique is characterized by a higher energy input due to its approach of oscillating the welding electrode or torch in a side-to-side motion while moving along the joint. This results in a broader heat-affected zone and allows for deeper penetration into the base materials. The oscillation increases the amount of heat generated at the weld pool, which can help blend the filler material into the base metal more thoroughly and enhance the overall strength of the weld.

This technique is often utilized when welding thicker sections or when greater fusion is required to ensure a quality joint. By using a weaving motion, the welder can more effectively control the amount of heat applied to the workpieces, which can be crucial for achieving the desired mechanical properties in the completed weld.

The other choices, such as depositing stringer beads, spot welding, and tacking, generally involve lower energy inputs due to their more straightforward, less oscillating methods which focus on localized heating or minimal convergence of the material, reducing the overall energy required for the weld.