Engineering Materials Objectives Part 07
121 . The resistivity of all normal metals as temperature is lowered “tends to zero”.
122 . Carburizing” processes is used to harden a steel.
123 . Wear resistance of a material depends on “hardness”.
124. The structure of common glass is “amorphous”.
125 . Neoprene is “rubber”.
126 . The principal property of a refractory material is its “high melting point”.
127 . “Quartz” is an example of piezo-electric material.
128 . The main constituent of glass is “SiO2”.
