36. What is the process of removing rust and corrosion from metal surfaces called?
a) Galvanization
b) Electroplating
c) Anodizing
d) Pickling
37. Which metal is primarily used for making jewelry, silverware, and mirrors due to its lustrous appearance?
a) Copper
b) Aluminum
c) Silver
d) Nickel
38. What is the process of heating a metal to a high temperature and then cooling it rapidly to increase its hardness called?
a) Annealing
b) Tempering
c) Quenching
d) Forging
39. Which metal is commonly used for making electrical and electronic components due to its excellent conductivity and reliability?
a) Copper
b) Aluminum
c) Iron
d) Gold
40. What is the process of coating a metal with a layer of zinc using an electric current called?
a) Galvanization
b) Electroplating
c) Anodizing
d) Tinning
