Which of the following statements about cold rolling is true?

• A. It is used in production of sheet, strip, and foil with a high-quality surface finish
• B. It is used only for hot metals
• C. It cannot achieve a high-quality surface finish
• D. It is used exclusively for non-metal materials

Answer: (A)

Cold rolling deforms metal at near room temperature, which produces a very smooth surface and tight thickness tolerances because the material doesn’t recrystallize during the shaping step. The process also strengthens the metal through work hardening, and the smooth contact with the rolls yields a high-quality surface finish. This combination makes sheet, strip, and foil products with excellent surface finish achievable through cold rolling.

So, the statement that cold rolling is used to produce sheet, strip, and foil with a high-quality surface finish is the best choice. It’s not limited to hot metals—cold rolling is specifically performed at low temperature—and it can and does achieve high-quality surface finishes. It’s also not exclusive to non-metal materials, since cold rolling is a standard method for many metallic products.