158) The machinability of aluminum increases when ______ is added to aluminum.
Answer is:
lead and bismuth
Related Engineering Materials MCQ with Answers
Answer is:
copper and zinc
Explanation:
Brass is an alloy of Copper and zinc
Answer is:
copper and tin
Explanation:
Bronze is an alloy consisting primarily of copper, commonly with about 12–12.5% tin and often with the addition of other metals (such as aluminium, manganese, nickel or zinc) and sometimes non-metals or metalloids such as arsenic, phosphorus or silicon.