Fuels and Combustion Blast furnace coke is made from coal by Medium temperature carbonisation High temperature carbonisation Low temperature carbonisation Heating the coal in an oven in presence of air Medium temperature carbonisation High temperature carbonisation Low temperature carbonisation Heating the coal in an oven in presence of air ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Undercharging of coal in the by-product coke ovens results in Decrease in the c.v. of coke oven gas Increase in its throughput Increase in the c.v. of coke oven gas No change in the c.v. of coke oven gas Decrease in the c.v. of coke oven gas Increase in its throughput Increase in the c.v. of coke oven gas No change in the c.v. of coke oven gas ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Compound coke ovens are those which can be heated by Both B and C Both steam and electrical power Rich gas (e.g., coke oven gas) Lean gas (e.g., B.F. gas) Both B and C Both steam and electrical power Rich gas (e.g., coke oven gas) Lean gas (e.g., B.F. gas) ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Which of the following is coking? Vitrain Neither A nor B Fussain Both A & B Vitrain Neither A nor B Fussain Both A & B ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion During the carbonisation of coal All of these All tar is evolved at < 600°C Hard semi-coke starts shrinking at 600°C Evolution of H₂ and formation of methane and aromatics occur at > 700°C All of these All tar is evolved at < 600°C Hard semi-coke starts shrinking at 600°C Evolution of H₂ and formation of methane and aromatics occur at > 700°C ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Volumetric ratio of N₂ to O₂ in dry atmospheric air is 0.79 3.76 4.76 0.21 0.79 3.76 4.76 0.21 ANSWER DOWNLOAD EXAMIANS APP
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