Metals and Mining sector

11. Which metal is the primary component of brass?
a) Copper
b) Zinc
c) Tin
d) Aluminum

12. What is the process of shaping metal by hammering or pressing called?
a) Casting
b) Forging
c) Extrusion
d) Machining

13. Which metal is used as a catalyst in the production of ammonia for fertilizer manufacturing?
a) Nickel
b) Platinum
c) Cobalt
d) Iron

14. What is the process of converting iron ore into steel called?
a) Refining
b) Smelting
c) Milling
d) Steelmaking

15. Which metal is primarily used for making coins?
a) Copper
b) Zinc
c) Silver
d) Aluminum