Fuels and Combustion The main drawback of supplying more excess air in the combustion of fuel is the Intermittant and uncontrolled combustion of the fuel Enhanced sensible heat loss in the flue gas High exit flue gas temperature from the furnace Excessive power requirement of air blower Intermittant and uncontrolled combustion of the fuel Enhanced sensible heat loss in the flue gas High exit flue gas temperature from the furnace Excessive power requirement of air blower ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Calorific value of a typical dry anthracite coal may be around __________ Kcal/kg. 4000 8000 1000 15000 4000 8000 1000 15000 ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Fussain All of these Is friable, charcoal like substance Has highest fixed carbon and lowest volatile matter content of all the four banded components of coal Is non-coking, but when blended with highly coking coal, controls its swelling and produces high strength coke on carbonisation All of these Is friable, charcoal like substance Has highest fixed carbon and lowest volatile matter content of all the four banded components of coal Is non-coking, but when blended with highly coking coal, controls its swelling and produces high strength coke on carbonisation ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion In general, the limit of inflammability/explosion limit of fuel gases is widened by the Use of pure oxygen for combustion instead of air Increase in temperature (i.e. preheating) All of these Increase in gas pressure Use of pure oxygen for combustion instead of air Increase in temperature (i.e. preheating) All of these Increase in gas pressure ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Which of the following is not increased by using preheated combustion air in place of ordinary air at room temperature? Calorific value of the fuel Speed of combustion of fuel Flame temperature achieved Heat transfer rate to the stock in the furnace Calorific value of the fuel Speed of combustion of fuel Flame temperature achieved Heat transfer rate to the stock in the furnace ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Combustion of pulverised fuel In a metallurgical furnace does not contaminate the product in the furnace by ash from fuel All of these Suppresses the discharge of fine dust and grit into atmosphere Requires larger combustion chamber than rich gaseous fuel In a metallurgical furnace does not contaminate the product in the furnace by ash from fuel All of these Suppresses the discharge of fine dust and grit into atmosphere Requires larger combustion chamber than rich gaseous fuel ANSWER DOWNLOAD EXAMIANS APP
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