Which of the following materials, on adding with copper, doesn’t increase its strength?(a) Cadmium(b) Silver(c) Sodium(d) Aluminium OxideThe question was asked in a job interview.I would like to ask this question from Copper Alloys in division Foundry Introduction & Materials of Casting-Forming-Welding II

Which of the following materials, on adding with copper, doesn’t inc

1.	Which of the following materials, on adding with copper, doesn’t increase its strength?(a) Cadmium(b) Silver(c) Sodium(d) Aluminium OxideThe question was asked in a job interview.I would like to ask this question from Copper Alloys in division Foundry Introduction & Materials of Casting-Forming-Welding II
Answer» The correct OPTION is (c) Sodium Explanation: Copper ORIGINALLY does not possess a very high amount of strength. For properties of copper to be USED, but with more strength, this copper needs to be mixed with certain material, which will provide it the required strength. Cadmium, silver and aluminium oxide are few of those MATERIALS which will aid in INCREASING its strength.

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