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1. 
What chemical elements can be added to steel to make the alloy magnetic and flexible?
A.
Silicon
B.
Manganese
C.
Nickel
D.
Tungsten
E.
Chrome
F.
Lead
2. 
What chemical elements can be added to steel to make the alloy stainless?
A.
Silicon
B.
Manganese
C.
Nickel
D.
Tungsten
E.
Chrome
F.
Lead
3. 
What chemical elements can be added to steel to prevent corrosion?
A.
Silicon
B.
Manganese
C.
Nickel
D.
Tungsten
E.
Chrome
F.
Lead
4. 
What chemical elements can be added to steel to make the alloy easier to cut with machine tools?
A.
Silicon
B.
Manganese
C.
Nickel
D.
Tungsten
E.
Chrome
F.
Lead
5. 
What chemical elements can be added to steel to make the alloy harder?
A.
Silicon
B.
Manganese
C.
Nickel
D.
Tungsten
E.
Chrome
F.
Lead