Fuels and Combustion Froth floatation is used for Removing ash from the coal based on difference in specific gravity of coal and ash All of these Washing fine coal dust (< 0.5 mm size) Washing lump coal (> 80 mm size) Removing ash from the coal based on difference in specific gravity of coal and ash All of these Washing fine coal dust (< 0.5 mm size) Washing lump coal (> 80 mm size) ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion High rate of heating of coke ovens Increases the time of carbonisation May damage its walls due to abrupt excessive swelling of coal None of these Produces larger size coke Increases the time of carbonisation May damage its walls due to abrupt excessive swelling of coal None of these Produces larger size coke ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Light oil whose major component is benzol, is obtained by the distillation of crude tar in the temperature range of __________ °C. 80-170 200-300 250-270 280-300 80-170 200-300 250-270 280-300 ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion The optimum percentage of excess air for combustion depends upon the __________ of the fuel. Ignition temperature Sulphur content Type (solid, liquid or gaseous) Calorific value Ignition temperature Sulphur content Type (solid, liquid or gaseous) Calorific value ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Pick the odd man out. Pitch creosote mixture Briquettes Oil gas Wood Pitch creosote mixture Briquettes Oil gas Wood ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion High sulphur (4-6%) coal in India are found in Bengal Madhya Pradesh Andhra Pradesh Assam Bengal Madhya Pradesh Andhra Pradesh Assam ANSWER DOWNLOAD EXAMIANS APP
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