Fuels and Combustion Washing of coal is done to reduce the Adhering impurities Mineral matter Both B and C Inherent impurities Adhering impurities Mineral matter Both B and C Inherent impurities ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Rate of low temperature oxidation of coal due to bad storage conditions Decreases with increase in surface area Does not vary with increase in surface area Is more for low volatile coal compared to high volatile coal Is accelerated by storage in large heaps with small surface to volume ratio Decreases with increase in surface area Does not vary with increase in surface area Is more for low volatile coal compared to high volatile coal Is accelerated by storage in large heaps with small surface to volume ratio ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Calorific value of coal middling generated in coal washeries during washing of coal may be around __________ Kcal/kg. 6000 4000 8000 1000 6000 4000 8000 1000 ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion A good metallurgical coke Should have low fusion point of its ash Must contain moderate quantities of ash, moisture, sulphur and volatile matters Should be brittle Should have high porosity Should have low fusion point of its ash Must contain moderate quantities of ash, moisture, sulphur and volatile matters Should be brittle Should have high porosity ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Coke compared to the coal from which it has been made, contains Less volatile matter More carbon All of these Greater percentage of ash Less volatile matter More carbon All of these Greater percentage of ash ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Fixed carbon in coal is defined as The total quantity of carbon present in the coal The one which is present in the residue after combustion Hundred minus the percentage of volatile matter, ash and moisture That present in volatile matters The total quantity of carbon present in the coal The one which is present in the residue after combustion Hundred minus the percentage of volatile matter, ash and moisture That present in volatile matters ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS