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Constantan is an alloy containing _________

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Constantan is an alloy containing _________

(a) Nickel and aluminum

(b) Silicon, manganese, and aluminum

(c) Copper and nickel

(d) Aluminum and manganese

I got this question in an interview for internship.

Question is from Pyrometry and the Types of Pyrometers in division Tools of the Metallurgist of Engineering Material & Metallurgy

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The correct answer is (c) Copper and nickel

The best I can explain: Thermoelectric pyrometer makes use of dissimilar materials for the metallic wires to develop an emf. One such material is Iron-Constantan. Constantan is an alloy containing 54% copper and 46% nickel. It is useful at a temperature range of 300-1400 F.

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