Hamad Fuels and Combustion 18/09/2020 A. 8800 kcal/m3 B. 8800 kcal/kg C. Same as that of coal middling D. 25000 kcal/kg Related Mcqs: _____________ has the widest inflammability limit (explosion limit) of all the gases?A. Hydrogen B. Carbon monoxide C. Acetylene D. Methane... Which of the following will be unsuitable for dust cleaning from flue gas at 400°C from a pulverised coal fired boiler ?A. Multicyclones B. Bag filter C. Wet scrubber D. Hydrocyclones... For long flame and easy ignition, the coal used should have_________________?A. High volatile matter B. Low ash C. High calorific value D. High ash... Ratio of primary air to secondary air increases with increase in the rank of coal, because the__________________?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... During coal carbonisation process, the conversion of semi-coke to coke is accompanied by an increase in the _______________ of the mass?A. Density B. Porosity C. Electrical resistivity D. None of these...
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