Correct option is B
The chip thickness ratio or cutting ratio is defined as the ratio of chip thickness before cutting to the thickness after cutting.
The
cutting ratio (denoted as
r) is defined as the ratio of the
chip velocity (Vc) to the
cutting velocity (V).
In machining, the cutting velocity is the speed at which the tool moves relative to the workpiece material, and the chip velocity represents the speed at which the chip moves away from the cutting zone. The cutting ratio is an important parameter used to understand chip formation and mechanics of cutting.
