when oxyacetylene welding, what is used to fill the gap? select one: a. brass filler rod b. flux - core…

Brief Explanations:

In oxyacetylene welding, for mild - steel workpieces, mild steel filler rod is commonly used to fill the gap. Brass filler rod is used for brazing and other non - ferrous metal joining in some cases. Flux - core solder is used in soldering, not in oxyacetylene welding. And in most oxyacetylene welding applications, a filler is needed.

Answer:

C. Mild steel filler rod