Fuels and Combustion Percentage of carbon monoxide in blast furnace gas may be around 22 8 52 14 22 8 52 14 ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Which of the following fuels is the best for burning on chain grate stoker? Coking coal Caking coal Non-caking coal Pulverised coal Coking coal Caking coal Non-caking coal Pulverised coal ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Sometimes water is sprayed during coal charging in the coke oven, which helps in Prevention of clinker formation in the oven Reducing the cracking of hydrocarbons in the gas and increasing the percentage of CO & H₂ in the gas (due to the endothermic reaction represented by C + H₂O = CO + H₂) All of these Controlling the dust nuisance while charging the coal Prevention of clinker formation in the oven Reducing the cracking of hydrocarbons in the gas and increasing the percentage of CO & H₂ in the gas (due to the endothermic reaction represented by C + H₂O = CO + H₂) All of these Controlling the dust nuisance while charging the coal ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion The heat of combustion of a fuel Is always positive Is always negative Is equal to the heat of formation Can't be known without calculating it Is always positive Is always negative Is equal to the heat of formation Can't be known without calculating it ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion During the carbonisation of coal All tar is evolved at < 600°C Hard semi-coke starts shrinking at 600°C All of these Evolution of H₂ and formation of methane and aromatics occur at > 700°C All tar is evolved at < 600°C Hard semi-coke starts shrinking at 600°C All of these Evolution of H₂ and formation of methane and aromatics occur at > 700°C ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Which of the following would require maximum amount of % excess air for complete combustion? Lump coal (fixed on chain grate) Pulverised coal Coke oven gas Furnace oil Lump coal (fixed on chain grate) Pulverised coal Coke oven gas Furnace oil ANSWER DOWNLOAD EXAMIANS APP
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