Fuels and Combustion Ignition temperature decreases progressively from anthracite to lignite, because Moisture content increases Volatile matter content increases Ash content increases Carbon content decreases Moisture content increases Volatile matter content increases Ash content increases Carbon content decreases ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Combustion of pulverised coal compared to the lumpy coal Facilitates combustion with lower excess air Provides better control of furnace temperature All of these Provides higher thermal efficiency & flame temperature Facilitates combustion with lower excess air Provides better control of furnace temperature All of these Provides higher thermal efficiency & flame temperature ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Prime coking coal is always blended with medium or non- coking coal before ear-bonisation 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 Neither A nor B Because, it alone produces unreactive coke ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Which of the following is the most poisonous gas? Producer gas Blast furnace gas Coke oven gas L.D. converter gas Producer gas Blast furnace gas Coke oven gas L.D. converter gas ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Calorific value of pitch creosote mixture (PCM) i.e., C.T.F.-200 is about Same as that of coal middling 8800 kcal/m³ 25000 kcal/kg 8800 kcal/kg Same as that of coal middling 8800 kcal/m³ 25000 kcal/kg 8800 kcal/kg ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion For maximum discharge through a chimney, its height should be Equal to the height of the hot gas column producing draught Infinitely long 200 meters More than 105.7 metres Equal to the height of the hot gas column producing draught Infinitely long 200 meters More than 105.7 metres ANSWER DOWNLOAD EXAMIANS APP
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