HomeEngineeringPermanent hardness of water can be removed by 5532. Permanent hardness of water can be removed byBy Admin / September 7, 2025 Addition of soda ash to it Treating it with zeolites Passing it through sodium hexametaphosphate All of the above ✅ The correct answer is option D.
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