Fuels and Combustion During the carbonisation of coal All tar is evolved at < 600°C Evolution of H₂ and formation of methane and aromatics occur at > 700°C All of these Hard semi-coke starts shrinking at 600°C All tar is evolved at < 600°C Evolution of H₂ and formation of methane and aromatics occur at > 700°C All of these Hard semi-coke starts shrinking at 600°C ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion The calorific value of producer gas is around __________ kcal/Nm³ 9000 500 1300 4500 9000 500 1300 4500 ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion High temperature in gasification of coal favours High production of CO Low production of CO₂ Both B and C High production of CO₂ High production of CO Low production of CO₂ Both B and C High production of CO₂ ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Fusion point of coal ash generally varies from 1000 to 1700° C. Ash having fusion point less than __________ °C is liable to form clinker. 1250 1400 1100 1350 1250 1400 1100 1350 ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Presence of free moisture in coal is most disadvantageous during Its pulverisation (as it requires more power) Combustion of fire slacks on the grates None of these Handling (e.g. when emptying wagons) Its pulverisation (as it requires more power) Combustion of fire slacks on the grates None of these Handling (e.g. when emptying wagons) ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion With increases in carbonisation temperature Methane percentage in the coke oven gas increases Hydrogen percentage in the coke oven gas decreases Coke even gas yield increases Tar yield increases Methane percentage in the coke oven gas increases Hydrogen percentage in the coke oven gas decreases Coke even gas yield increases Tar yield increases ANSWER DOWNLOAD EXAMIANS APP
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