HomeEngineering__________ treatment is done for appreciable improvement in viscosity index of lubricating oil. 2499. __________ treatment is done for appreciable improvement in viscosity index of lubricating oil.By Admin / September 7, 2025 Acid Solvent extraction Alkali Clay ✅ The correct answer is option B.
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