Fuels and Combustion Coal is heated in absence of air for 7 minutes at a temperature of about __________ °C, during its volatile matter determination for proximate analysis. 550 950 750 1150 550 950 750 1150 ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Bulk density of pulverised coal may be about __________ kg/m³. 1500 100 1000 500 1500 100 1000 500 ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Tar yield in the low temperature and high temperature carbonisation of dry coal may be respectively __________ percent. 10 & 20 10 & 3 15 & 8 3 & 10 10 & 20 10 & 3 15 & 8 3 & 10 ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Highly caking coals Produce strong coke Both B and C Produce weak coke May damage the coke oven walls during carbonisation Produce strong coke Both B and C Produce weak coke May damage the coke oven walls during carbonisation ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Ignition temperature decreases progressively from anthracite to lignite, because Volatile matter content increases Carbon content decreases Moisture content increases Ash content increases Volatile matter content increases Carbon content decreases Moisture content increases Ash content increases ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Froth floatation is used for Washing fine coal dust (< 0.5 mm size) Removing ash from the coal based on difference in specific gravity of coal and ash Washing lump coal (> 80 mm size) All of these Washing fine coal dust (< 0.5 mm size) Removing ash from the coal based on difference in specific gravity of coal and ash Washing lump coal (> 80 mm size) All of these ANSWER DOWNLOAD EXAMIANS APP
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