Fuels and Combustion For maximum discharge through a chimney, its height should be Equal to the height of the hot gas column producing draught 200 meters Infinitely long More than 105.7 metres Equal to the height of the hot gas column producing draught 200 meters Infinitely long More than 105.7 metres ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion High ash containing coke Produces more slag when used in the blast furnace None of these Has poor strength and abrasion resistance Is desirable in producer gas manufacture Produces more slag when used in the blast furnace None of these Has poor strength and abrasion resistance Is desirable in producer gas manufacture ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Rate of low temperature oxidation of coal due to bad storage conditions Is more for low volatile coal compared to high volatile coal Decreases with increase in surface area Does not vary with increase in surface area Is accelerated by storage in large heaps with small surface to volume ratio Is more for low volatile coal compared to high volatile coal Decreases with increase in surface area Does not vary with increase in surface area Is accelerated by storage in large heaps with small surface to volume ratio ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Width of the coke oven towards coke side is slightly more than that on pusher side to Facilitate easy discharging of coke as it swells during carbonisation None of these Facilitate uniform heating of the oven Increase the output of the coke Facilitate easy discharging of coke as it swells during carbonisation None of these Facilitate uniform heating of the oven Increase the output of the coke ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion A liquid/gaseous fuel containing hydrocarbons and high amount of sulphur is burnt with 40% excess air. The flue gas still contains large amount of carbon monoxide. This may be due to the High sulphur content in the fuel Presence of large quantity of hydrogen in the fuel Low calorific value of the fuel Lack of thorough mixing of fuel with air High sulphur content in the fuel Presence of large quantity of hydrogen in the fuel Low calorific value of the fuel Lack of thorough mixing of fuel with air ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion L.D. converter gas (produced in steel plant) comprises mainly of CO₂ & O₂ CO₂ & H₂ CO (upto 65%) & CO₂ CO & O₂ CO₂ & O₂ CO₂ & H₂ CO (upto 65%) & CO₂ CO & O₂ ANSWER DOWNLOAD EXAMIANS APP
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