Fuels and Combustion Increase in ash content of blast furnace coke Reduces its consumption in the furnace Decreases its hardness and abrasion resistance Does not affect its consumption in the furnace Increases its consumption in the furnace Reduces its consumption in the furnace Decreases its hardness and abrasion resistance Does not affect its consumption in the furnace Increases its consumption in the furnace ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Blast furnace gas compared to coke oven gas has Lower theoretical flame temperature Narrower limit of inflammability Higher calorific value Lower ignition temperature Lower theoretical flame temperature Narrower limit of inflammability Higher calorific value Lower ignition temperature ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Ignition temperature of a fuel in air is __________ that in pure oxygen. Equal to Either more or less; depends on the type of fuel More than Less than Equal to Either more or less; depends on the type of fuel More than Less than ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Froth floatation is used for Removing ash from the coal based on difference in specific gravity of coal and ash All of these Washing fine coal dust (< 0.5 mm size) Washing lump coal (> 80 mm size) Removing ash from the coal based on difference in specific gravity of coal and ash All of these Washing fine coal dust (< 0.5 mm size) Washing lump coal (> 80 mm size) ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Which of the following is the most reactive (as regards the formation of CO + H₂ from C + H₂O) ? Anthracite coal Sub-bituminous coal Blast furnace coke Low temperature coke Anthracite coal Sub-bituminous coal Blast furnace coke Low temperature coke ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion If the specific heat of gaseous products of combustion of a fuel is high, the abiabatic flame temperature will be Very high, if the fuel is of low calorific value None of these Low High Very high, if the fuel is of low calorific value None of these Low High ANSWER DOWNLOAD EXAMIANS APP
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