General Studies · Manufacturing Processes

Which of the following statements are true regarding manufacturing processes? A. Hot-rolled and hot-drawn products have wider dimensional tolerances and rougher surface finish than cold-rolled and cold-drawn products. B. Seamless tubing made by the tube-rolling process has more thickness variation than roll-formed and welded tubing. C. Castings generally have higher dimensional accuracy and smoother surface finish than parts made by cold extrusion. D. Extrusions have smaller cross-sectional dimensional tolerances than parts made by roll forming.