1808Mechanical EngineeringMedium
Addition of lead and bismuth to aluminium results in________?
Aone of the best known age and precipitation-hardening systems
Bimprovement of casting characteristics
Cimprovement of corrosion resistance
Dimproving machinability
Enone of the above
Correct answer
D. improving machinability
Explanation
The correct answer is improving machinability.