14. When using sanding to taper the noint on a tungsten electrode what size grit should a welder use for finishing? a. 60 b. 80 c. 120 d. 200

The correct answer is c. 120.<br /><br />When tapering the point on a tungsten electrode using sanding, a welder should use a grit size of 120 for finishing. This grit size provides a balance between removing material and achieving a smooth, polished surface. It is coarse enough to remove any imperfections but fine enough to produce a smooth finish. Using a finer grit, such as 200, may result in excessive material removal and a rough surface, while using a coarser grit, such as 60 or 80, may not provide a smooth enough finish. Therefore, a grit size of 120 is the most suitable choice for tapering the point on a tungsten electrode.