HomeEngineeringRatio of primary air to secondary air increases with increase in the rank of coal, because the 2792. Ratio of primary air to secondary air increases with increase in the rank of coal, because theBy Admin / September 7, 2025 High rank coals have higher amount of volatile matter Ratio of fixed carbon to volatile matter increases Oxygen content progressively decreases Calorific value of the coal increases ✅ 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