HomeEngineeringPrincipal alloying element in Elinvar (used for making hair springs for watches) is 640. Principal alloying element in Elinvar (used for making hair springs for watches) isBy Admin / September 6, 2025 A. Copper B. Aluminium C. Nickel D. Zinc ✅ The correct answer is option C.
1. A fire tube boiler is limited to a maximum steam pressure of about __________ kg/cm². Leave a Comment / Basic Chemical Engineering MCQs, Chemical Engineering, Engineering / By Admin
2. Transformer cores are normally made from Leave a Comment / Basic Chemical Engineering MCQs, Chemical Engineering, Engineering / By Admin