Post by: jazziefee on Nov 18, 2019
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?◦ CaCO3(s) + SiO2(s)
CaSiO3(l) + CO2(g)◦ SnO2(s) + 2C(s)
Sn(l) + 2CO(g)◦ 2CuS(s) + 3O2
2CuO(s) + 2SO2(g)◦ PbO(s) + CO(g)
Pb(l) + CO2(g)◦ MgCO3(s)
MgO(s) + CO2(g)
Post by: heyhey123 on Nov 18, 2019
Answer 1
It usually requires lower temperatures than casting the molten metal.Answer 2
MgCO3(s) MgO(s) + CO2(g)