96. What is the process of converting iron into steel by heating the iron with a controlled amount of carbon and other alloying elements and then slowly cooling it in a controlled atmosphere called?
a) Refining
b) Smelting
c) Milling
d) Controlled-cooling
97. Which metal is primarily used for making electrical contacts and connectors in electronic devices due to its low contact resistance and resistance to corrosion?
a) Copper
b) Aluminum
c) Silver
d) Indium
98. What is the process of converting iron into steel by heating the iron with a controlled amount of carbon and other alloying elements and then rapidly cooling it to increase its hardness called?
a) Refining
b) Smelting
c) Milling
d) Hardening
99. Which metal is commonly used for making electrical contacts and connectors in high-temperature and high-power applications due to its high melting point and resistance to corrosion?
a) Copper
b) Aluminum
c) Silver
d) Tungsten
100. What is the process of converting iron into steel by heating the iron with a controlled amount of carbon and other alloying elements and then slowly cooling it to relieve internal stresses called?
a) Refining
b) Smelting
c) Milling
d) Annealing
