Fuels and Combustion The maximum percentage of CO₂ in a flue gas (from a carbonaceous fuel) can be 29 21 77 79 29 21 77 79 ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Washing of coal Improves its coking properties Reduces its sulphur and ash content All of these Controls its ash fusibility and increases its calorific value Improves its coking properties Reduces its sulphur and ash content All of these Controls its ash fusibility and increases its calorific value ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Prime coking coal is always blended with medium or non- coking coal before ear-bonisation Neither A nor B Because, it alone produces unreactive coke Both A & B To check against its excessive swelling during heating, which may exert high pressure and damage coke oven walls Neither A nor B Because, it alone produces unreactive coke Both A & B To check against its excessive swelling during heating, which may exert high pressure and damage coke oven walls ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion The main function of primary air in pulverised coal fired burner is to 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 Burn CO to CO₂ Dry and transport the coal ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion A coal containing high amount of volatile matter will have Low adiabatic flame temperature Low ignition temperature Very little ash content High fusion point of its ash Low adiabatic flame temperature Low ignition temperature Very little ash content High fusion point of its ash ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Coal tar (produced by high temperature carbonisation) is the main source of Olefins Paraffins Alphatic compounds Aromatic compounds Olefins Paraffins Alphatic compounds Aromatic compounds ANSWER DOWNLOAD EXAMIANS APP
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