<P> Slag does not contribute to strength or protection of metals after the welding process; it is waste material . Removal of the slag is necessary for four reasons: </P> <Ol> <Li> ability to inspect the quality of the weld area; </Li> <Li> aesthetics, or visual appearance; </Li> <Li> if a second layer or pass of welding is to be made on top of the first; </Li> <Li> to clean and clear the surface for coatings such as paint or oil . </Li> </Ol> <Li> ability to inspect the quality of the weld area; </Li> <Li> aesthetics, or visual appearance; </Li>

Which of the following is used to remove slag from a welded joint