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991. Age hardening is connected with

September 6, 2025 by Admin

A. Babbit metal

B. Gun metal

C. Stainless steel

D. Duralumin

✅ The correct answer is option D.

Categories Basic Chemical Engineering MCQs, Chemical Engineering, Engineering Tags Basic Chemical Engineering MCQs, Chemical Engineering MCQs, Engineering MCQs

989. The size of the tetrahedral void in the closest packing of atoms is __________ that of the octahedral void.

993. A hot short metal is

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