Cold working increases ______ of the metal.
A. hardness
B. ductility
C. melting point
D. conductivity
Answer:A
Cold working increases ______ of the metal.
A. hardness B. ductility C. melting point D. conductivity
Explanation: Cold working increases strength, hardness, and electrical resistance, and it decreases ductility. In the recovery stage of annealing, the physical and mechanical properties that suffered changes as a result of cold working tend to recover their original values.