$1.$ What is the primary function of cutting tool materials? a$)$ To increase the hardness of the workpiece b$)$ To facilitate chip formation during machining c$)$ To minimize the friction between the tool and workpiece d$)$ To provide structural support to the workpiece$2.$ Which of the following is NOT a desirable property of tool materials? a$)$ High hardness b$)$ Low thermal conductivity c$)$ High toughness d$)$ High wear resistance$3.$ Which characteristic is important for cutting tool materials to resist deformation and wear? a$)$ Ductility b$)$ Brittleness c$)$ Toughness d$)$ Hardness$4.$ Cutting tool geometry primarily influences: a$)$ The speed of the machining process b$)$ The shape and size of the finished part c$)$ The forces acting on the tool and workpiece d$)$ The temperature of the machining operation$5.$ In machining, chip flow direction is determined by: a$)$ Tool rotation speed b$)$ Feed rate c$)$ Cutting edge geometry d$)$ Workpiece material