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 Main constituent of natural gas is CH₄ (upto 90%) H₂ C₂H₆ C₃H₈ CH₄ (upto 90%) H₂ C₂H₆ C₃H₈ ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Percentage of nitrogen in blast furnace gas may be around 80 25 55 5 80 25 55 5 ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Coke oven gas burns with an yellowish flame, because of the presence of CH₄ CO₂ H₂ NH₃ CH₄ CO₂ H₂ NH₃ ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Abel apparatus is used for those oils, whose flash points are___°F. >280 >120 300-600 >280 >120 300-600 ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Higher percentage of ash in coal meant for the production of metallurgical grade coke Causes brittleness in steel Decreases the abrasion resistance of coke None of these Decreases the hardness of coke Causes brittleness in steel Decreases the abrasion resistance of coke None of these Decreases the hardness of coke ANSWER DOWNLOAD EXAMIANS APP
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