$2.$What is the primary function of chip breakers in machining operations?a$)$ To improve surface finishb$)$ To control chip formation and break them into small piecesc$)$ To reduce tool weard$)$ To prevent built$-$up edge formationWhich parameter directly affects the surface finish of the machined part?a$)$ Cutting speedb$)$ Feed ratec$)$ Depth of cutd$)$ Tool materialIndexable inserts are commonly used in which machining processes?a$)$ Turning and millingb$)$ Grinding and honingc$)$ EDM and laser cuttingd$)$ Waterjet cutting and ultrasonic machiningWhat is the primary purpose of a clearance angle in cutting tool geometry?a$)$ To reduce cutting forcesb$)$ To prevent tool chippingc$)$ To provide clearance between the tool and the workpieced$)$ To control chip flow directionWhat is the significance of the rake angle in cutting tool geometry?a$)$ It determines the width of the cutb$)$ It controls the direction of chip flowc$)$ It influences the cutting forces acting on the toold$)$ It determines the depth of cut