Q134
Addition of copper to aluminium results in
A.
Improvement of casting characteristics
B.
Improvement of corrosion resistance
C.
One of the best known age and precipitation hardening systems
AnswerD.
Improving machinability
Answer: Option C
Solution
Answer: Option C
Solution:
The copper provides substantial increases in strength and facilitates precipitation hardening.The introduction of copper to aluminum can also reduce ductility and corrosion resistance.