Which category includes sawing, filing, and threading?

Which category includes sawing, filing, and threading?

• A. Material Removal Processes
• B. Forming
• C. Joining
• D. Finishing

Answer: (A)

Material removal is the class of processes that achieve a final size, shape, or feature by removing material from a starting workpiece. Sawing, filing, and threading all cut away material to create the desired geometry: a blade slices through material, a file shears off small chips to refine size and finish, and threading cuts spiraled grooves by removing material to form threads. The other categories work differently: forming changes shape through plastic deformation without removing material; joining attaches pieces together; finishing focuses on improving surface quality and dimensional accuracy, sometimes with minor material removal but not as the primary method. Therefore, these operations belong to material removal processes.

Material removal is the class of processes that achieve a final size, shape, or feature by removing material from a starting workpiece. Sawing, filing, and threading all cut away material to create the desired geometry: a blade slices through material, a file shears off small chips to refine size and finish, and threading cuts spiraled grooves by removing material to form threads. The other categories work differently: forming changes shape through plastic deformation without removing material; joining attaches pieces together; finishing focuses on improving surface quality and dimensional accuracy, sometimes with minor material removal but not as the primary method. Therefore, these operations belong to material removal processes.