Engineering Materials MCQ with Answers

Engineering Materials MCQ with Answers

251) Which is false statement about properties of aluminium

Answer is:

wear resistance is very good

252) Addition of copper to aluminium results in

Answer is:

one of the best known age and precipitation-hardening systems

253) Addition of manganese to aluminium results in

Answer is:

improvement of corrosion resistance

254) Elinvar, an alloy used in precision instruments, hair springs for watches, etc. contains the following element as principal alloying element

Answer is:

nickel.

255) Which of the following alloys does not have copper as one of the constituents

Answer is:

nichrome

Explanation:

Nichrome is a nickel-chromium alloy with non-magnetic properties.

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