Fuels and Combustion The main function of primary air in pulverised coal fired burner is to Burn CO to CO₂ Dry and transport the coal Preheat the tertiary air used for complete combustion of CO to CO₂ Have proper combustion by supplying it around the burner Burn CO to CO₂ Dry and transport the coal Preheat the tertiary air used for complete combustion of CO to CO₂ Have proper combustion by supplying it around the burner ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Combustion of pulverised fuel Requires larger combustion chamber than rich gaseous fuel In a metallurgical furnace does not contaminate the product in the furnace by ash from fuel Suppresses the discharge of fine dust and grit into atmosphere All of these Requires larger combustion chamber than rich gaseous fuel In a metallurgical furnace does not contaminate the product in the furnace by ash from fuel Suppresses the discharge of fine dust and grit into atmosphere All of these ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Presence of nitrogen in combustion air does not reduce the Amount of heat liberated Any of the above Flame temperature Flue gas temperature Amount of heat liberated Any of the above Flame temperature Flue gas temperature ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion With increase in the temperature of carbonisation of coal Methane content in the coke oven gas decreases and carbon monoxide content increases Hydrogen content of coke oven gas increases due to cracking of hydrocarbons Calorific value of the coke oven gas decreases due to cracking of hydrocarbons which is not compensated by increase in CO & H? content All of these Methane content in the coke oven gas decreases and carbon monoxide content increases Hydrogen content of coke oven gas increases due to cracking of hydrocarbons Calorific value of the coke oven gas decreases due to cracking of hydrocarbons which is not compensated by increase in CO & H? content All of these ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Which of the following fuel gases has the highest calorific value ? Coal bed methane (CBM) Sewage gas Natural gas Liquefied petroleum gas (LPG) Coal bed methane (CBM) Sewage gas Natural gas Liquefied petroleum gas (LPG) ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Blast furnace gas burns with a bluish flame, because of the presence of CO₂ CH₄ CO S CO₂ CH₄ CO S ANSWER DOWNLOAD EXAMIANS APP
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