$3.$Which tool material is preferred for high$-$speed machining of aluminum alloys?a$)$ High$-$speed steelb$)$ Carbidec$)$ Ceramicsd$)$ Cubic boron nitrideWhich cutting parameter primarily determines the material removal rate?a$)$ Cutting speedb$)$ Feed ratec$)$ Depth of cutd$)$ Tool nose radiusWhat is the primary function of chip breakers?a$)$ To control chip flow directionb$)$ To prevent tool wearc$)$ To improve surface finishd$)$ To break chips into manageable sizesWhich tool material offers the best combination of hardness and toughness for general machining applications?a$)$ High$-$speed steelb$)$ Carbidec$)$ Ceramicsd$)$ Cubic boron nitrideHow does the relief angle influence the cutting process?a$)$ It controls the width of the cutb$)$ It reduces friction between the tool and workpiecec$)$ It provides clearance between the tool and the workpieced$)$ It determines the depth of cut