56. What is the process of shaping metal by heating it to a high temperature and then hammering or pressing it into shape called?
a) Casting
b) Forging
c) Extrusion
d) Machining
57. Which metal is primarily used for making jewelry, electrical contacts, and other applications requiring high electrical conductivity?
a) Copper
b) Aluminum
c) Silver
d) Gold
58. What is the process of removing metal from a workpiece using an abrasive wheel or tool called?
a) Casting
b) Forging
c) Extrusion
d) Grinding
59. Which metal is commonly used for making aircraft structures, rocket engines, and other aerospace applications due to its high strength-to-weight ratio and heat resistance?
a) Copper
b) Aluminum
c) Iron
d) Titanium
60. What is the process of removing metal from a workpiece using a cutting tool or laser beam called?
a) Casting
b) Forging
c) Extrusion
d) Cutting
