Question 1
Which of the following is TRUE of powder metallurgy?
◦ It is used to separate gangue from the rest of the metal ore.
◦ Iron powder from mill scrap makes a denser component than iron particles formed through water atomization.
◦ There is more waste than with casting the molten metal.
◦ Machining is required after forming the component.
◦ It usually requires lower temperatures than casting the molten metal.
Question 2
Which of the following is an example of calcination?
◦ CaCO
3(
s) + SiO
2(
s)
CaSiO
3(
l) + CO
2(
g)
◦ SnO
2(
s) + 2C(
s)
Sn(
l) + 2CO(
g)
◦ 2CuS(
s) + 3O
2 2CuO(
s) + 2SO
2(
g)
◦ PbO(
s) + CO(
g)
Pb(
l) + CO
2(
g)
◦ MgCO
3(
s)
MgO(
s) + CO
2(
g)
