61. Which metal is primarily used for making electrical wiring and power transmission due to its low resistance and cost-effectiveness?
a) Copper
b) Aluminum
c) Iron
d) Silver
62. What is the process of joining two metal pieces together by melting and flowing a filler metal into the joint called?
a) Casting
b) Welding
c) Soldering
d) Brazing
63. Which metal is commonly used for making kitchen utensils, pots, and pans due to its excellent heat conductivity and corrosion resistance?
a) Copper
b) Aluminum
c) Iron
d) Stainless steel
64. What is the process of joining two metal pieces together by melting and solidifying the base metal itself called?
a) Casting
b) Welding
c) Soldering
d) Brazing
65. Which metal is primarily used for making car bodies and structural components due to its high strength and formability?
a) Copper
b) Aluminum
c) Iron
d) Steel
