Fuels and Combustion Fuel gases containing hydrocarbons (ie.g. coke oven gas) are not preheated before burning, mainly because It reduces its calorific value tremendously The hydrocarbons crack thereby choking and fouling the heat transfer surface by carbon soot It reduces its flame temperature tremendously There are chances of explosion during preheating It reduces its calorific value tremendously The hydrocarbons crack thereby choking and fouling the heat transfer surface by carbon soot It reduces its flame temperature tremendously There are chances of explosion during preheating ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Preheating of combustion air is done to Increase the adiabatic flame temperature Increase the calorific value of the fuel Complete the combustion of fuel Reduce its requirement for effecting the complete combustion Increase the adiabatic flame temperature Increase the calorific value of the fuel Complete the combustion of fuel Reduce its requirement for effecting the complete combustion ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion With increases in carbonisation temperature 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 Methane percentage in the coke oven gas increases ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Sulphur in metallurgical coal Neither A nor B Contributes to its heating value Both A and B Affects the quality of steel produced as cracks develop on the surface while rolling the steel Neither A nor B Contributes to its heating value Both A and B Affects the quality of steel produced as cracks develop on the surface while rolling the steel ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Which of the following coke has the least percentage of ash? Metallurgical coke Foundary coke Petroleum coke Beehive coke Metallurgical coke Foundary coke Petroleum coke Beehive coke ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Coal is heated in presence of air to a temperature of about __________ °C, while determining its ash content for proximate analysis. 950 500 750 1100 950 500 750 1100 ANSWER DOWNLOAD EXAMIANS APP
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