Ratio of primary air to secondary air increases with increase in the rank of coal, because the__________________?
A. Ratio of fixed carbon to volatile matter increases

B. Calorific value of the coal increases

C. High rank coals have higher amount of volatile matter

D. Oxygen content progressively decreases

Be the first to comment if anything wrong with this mcq
Your comment successfully submitted!
It will automatically posted after review and approval by our staff member.