Fuels and Combustion

A. High caking index
B. Low fusion point of ash
C. High volatile matter content
D. Very low ash content (8-10%)

A. Burning on travelling grate
B. Coke making
C. Burning on firebars
D. All A., B. and C.

A. Smoking tendency on burning
B. Coke oven gas yield on carbonisation
C. Chance of catching fire during storage in open space
D. Ignition temperature

A. Coke
B. Anthracite
C. Coal having low fusion point of its ash
D. Coal having high fusion point of its ash

A. Scale losses of the furnace stock
B. Calorific value of the fuel
C. Flame temperature
D. None of these

A. Coke oven gas
B. Blast furnace gas
C. Natural gas
D. None of these

A. Lower ignition temperature
B. Narrower limit of inflammability
C. Higher calorific value
D. Lower theoretical flame temperature

A. Carburetted water gas
B. Gobar gas
C. Natural gas
D. LPG

A. Burn CO to CO2
B. Dry and transport the coal
C. Have proper combustion by supplying it around the burner
D. Preheat the tertiary air used for complete combustion of CO to CO2

A. Reduction in coal size
B. Increase in its friability
C. Decrease in its caking capacity
D. All A., B. and C.