HomeEngineeringSub zero treatment of steel is done to 990. Sub zero treatment of steel is done toBy Admin / September 6, 2025 A. Suppress martensite transformation B. Enhance its working performance in sub zero atmosphere C. Reduce the retained austenite in hardened steel D. Induce temper brittleness after its hardening ✅ 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