Ratio of primary air to secondary air increases with increase in the rank of coal, because the Options: A . &nbspHigh rank coals have higher amount of volatile matter B . &nbspRatio of fixed carbon to volatile matter increases C . &nbspOxygen content progressively decreases D . &nbspCalorific value of the coal increases

Ratio of primary air to secondary air increases with increase in the rank of coa

Question

Ratio of primary air to secondary air increases with increase in the rank of coal, because the

Options:

A . High rank coals have higher amount of volatile matter

B . Ratio of fixed carbon to volatile matter increases

C . Oxygen content progressively decreases

D . Calorific value of the coal increases

Answer: Option B

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