Fuels and Combustion
Softening temperature of coal ash is a measure of the __________ of coal.

Coking tendency
Size stability
Clinkering tendency
Caking tendency

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Fuels and Combustion
Coke oven gas is a better fuel than blast furnace gas, because of its higher

All of these
Adiabatic flame temperature
Heat release rate (thus requiring smaller combustion chamber)
Calorific value, cleanliness and relatively low distribution cost (due to its low specific gravity)

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