Fuels and Combustion Which of the following is the most important deterrents to an extended use of pulverised coal in boiler firing? Ash disposal problem Erosion of induced draft fan blades Excessive fly-ash discharge from the stack High power consumption in its transportation Ash disposal problem Erosion of induced draft fan blades Excessive fly-ash discharge from the stack High power consumption in its transportation ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion For the case of a fuel gas undergoing combustion with air, if the air/fuel ratio is increased, the adiabatic flame temperature will Increase or decrease depending on the fuel type Not change Increase Decrease Increase or decrease depending on the fuel type Not change Increase Decrease ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Oxygen percentage (by weight) in atmospheric air is 29 23 19 21 29 23 19 21 ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Calorific value of a typical dry anthracite coal may be around __________ Kcal/kg. 8000 1000 4000 15000 8000 1000 4000 15000 ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion L.D. converter gas (produced in steel plant) comprises mainly of CO (upto 65%) & CO₂ CO₂ & O₂ CO & O₂ CO₂ & H₂ CO (upto 65%) & CO₂ CO₂ & O₂ CO & O₂ CO₂ & H₂ ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Explosion limit of blast furnace gas is 37 to 71% gas in gas-air mixture. It means that the blast furnace gas will explode when burnt in a confined space, if its concentration in the gas-air mixture is __________ percent. >71% None of these < 37% In between 37 & 71% >71% None of these < 37% In between 37 & 71% ANSWER DOWNLOAD EXAMIANS APP
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