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Addition of tellurium to copper results in ________

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Addition of tellurium to copper results in ________

(a) High strength

(b) Decreased electrical conductivity

(c) Increased machinability

(d) No effect

I have been asked this question in semester exam.

I need to ask this question from Copper and its Alloys topic in portion Non Ferrous Materials of Engineering Material & Metallurgy

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The correct answer is (c) Increased machinability

Best explanation: When copper is added with tellurium, it gives good machinability. Beryllium, chromium, or 1-3% lead can be added to increase strength. Cadmium also increases strength but reduces electrical conductivity.

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