HomeEngineeringPermanent hardness of water is due to the presence of calcium & magnesium 5186. Permanent hardness of water is due to the presence of calcium & magnesiumBy Admin / September 7, 2025 Bi-carbonates Sulphates & chlorides Carbonate None of these ✅ 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