Fuels and Combustion Function of secondary air in pulverised coal firing is to Transport the coal to the burner Dry the coal Ensure efficient burning of coal around the burner Reduce primary air requirement Transport the coal to the burner Dry the coal Ensure efficient burning of coal around the burner Reduce primary air requirement ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion A good metallurgical coke 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 Should have low fusion point of its ash Must contain moderate quantities of ash, moisture, sulphur and volatile matters ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Abrasion index of blast furnace coke should be around __________ percent. 20 55 80 35 20 55 80 35 ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Low temperature oxidation and spontaneous combustion of freshly mined coal is accentuated, if Smaller fines are stored in large quantity All of these It contains large amount of volatile matter It is stored in tall heaps Smaller fines are stored in large quantity All of these It contains large amount of volatile matter It is stored in tall heaps ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Nitrogen present in the flue gas is determined in the orsat apparatus by absorbing it in Ammoniacal cuprous chloride Pyrogallol solution KOH None of these Ammoniacal cuprous chloride Pyrogallol solution KOH None of these ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion With increase in the oxygen content of the coal, its __________ decreases. Both A & B Calorific value Neither A nor B Caking power Both A & B Calorific value Neither A nor B Caking power ANSWER DOWNLOAD EXAMIANS APP
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