Learn about new technologies!

What is the correct answer?


A drill bit of 20 mm diameter rotating at 500 r.p.m. with a feed rate of 0.2 mm/revolution is used to drill a through hole in a mild steel plate 20 mm thickness. The depth of cut in this drilling operation is

A. 0.2 mm

B. 10 mm

C. 20 mm

D. 100 mm