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”.