Fuels and Combustion Function of secondary air in pulverised coal firing is to Dry the coal Reduce primary air requirement Transport the coal to the burner Ensure efficient burning of coal around the burner Dry the coal Reduce primary air requirement Transport the coal to the burner Ensure efficient burning of coal around the burner ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Use of pulverised coal in boiler furnace provides Less erosion on furnace walls High calorific value Better combustion Smokeless burning Less erosion on furnace walls High calorific value Better combustion Smokeless burning ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion With increase in the time of carbonisation at a particular temperature (say 1000°C), the __________ percentage in coke oven gas increases. Methane Hydrogen All of these Unsaturated hydrocarbons Methane Hydrogen All of these Unsaturated hydrocarbons ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Froth floatation is used for Removing ash from the coal based on difference in specific gravity of coal and ash Washing fine coal dust (< 0.5 mm size) All of these Washing lump coal (> 80 mm size) Removing ash from the coal based on difference in specific gravity of coal and ash Washing fine coal dust (< 0.5 mm size) All of these Washing lump coal (> 80 mm size) ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Dust content in raw blast furnace gas is about __________ gm/Nm³ , hence it is cleaned to the dust level of about < 10 mg /Nm³ before use. 150-200 15-30 70-100 43832 150-200 15-30 70-100 43832 ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Dry air required to burn 1 kg of carbon completely may be around __________ kg. 2 11 20 38 2 11 20 38 ANSWER DOWNLOAD EXAMIANS APP
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