7.(a) What kind of materials is OFHC copper? (b) What are the desirable properties of OFHC copper? (c) What are the application of OFHC copper in the power industry?
8.(a) To which class of materials does PTFE belong? (b) What are its desirable properties? (c) What are its applications in cookware manufacturing industries?
9.(a) To which class of materials does cubic boron nitride (cBN) belong? (b) What are its desirable properties? (c) What are its applications in the metal machining industries?