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LA Cutting Tool Technology 1. Thermal conductivity of cutting tool must be (a) high, (b) low, or (c) very low. 2. Hot hardness of cutting tool should be (a) high, (b) low, or (c) very low. 3. Of the three possible modes by which a cutting tool can fail during a machining operation, which one is most preferable: (a) fracture failure, (b) gradual wear, or (c) temperature failure? 4. Of the following cutting conditions, which one has the greatest effect on tool wear: (a) cutting speed, (b) depth of cut, or (e) feed? 5. Crater wear occurs at (a) tool shank, (b) tool flank, or (c) tool face. 6. Crater wear occurs more in (a) soft material, (b) hard material, or (c) brittle material. 7. Which one of the following materials has the highest hardness: (a) aluminum oxide, (b) cubic boron nitride, (c) high-speed steel, (d) titanium carbide, or (e) tungsten carbide? 8. Temperature rise in primary deformation zone is generally due to (a) plastic deformation of metal in shear zone, (b) friction between tool and chip, or (c) rubbing action of tool piece with work piece. 9. Amount of heat generated in shear plane is (a) directly proportional to shear angle, (b) inversely proportional to shear angle, or (c) does not depend on shear angle. 10. By increasing feed rate, amount of heat generated (a) increases, (b) decreases, or (c) remains constant. 11. By increasing cutting speed, amount of heat generated (a) increases, (b) decreases, or (c) remains constant.