Fuels and Combustion Function of secondary air in pulverised coal firing is to Transport the coal to the burner Reduce primary air requirement Ensure efficient burning of coal around the burner Dry the coal Transport the coal to the burner Reduce primary air requirement Ensure efficient burning of coal around the burner Dry the coal ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Heat penetration rate in narrow coke ovens in high temperature carbonisation of coal is around __________ cm/hr. 2.5 0.5 20 10 2.5 0.5 20 10 ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion In low temperature carbonisation of coal as compared to high temperature carbonisation __________ produced is less. Free carbon content in tar Yield percentage of coke Yield of ammonia present in coke oven gas Difference in gross & net calorific value of the coke oven gas Free carbon content in tar Yield percentage of coke Yield of ammonia present in coke oven gas Difference in gross & net calorific value of the coke oven gas ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Dry air required to burn 1 kg of carbon completely may be around __________ kg. 11 20 38 2 11 20 38 2 ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion The difference between total carbon and fixed carbon of coal will be minimum in case of Anthracite Bituminous coal High temperature coke (V.M < 0.5%) Lignite Anthracite Bituminous coal High temperature coke (V.M < 0.5%) Lignite ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion The fuel ratio of a coal is The ratio of its percentage of fixed carbon to that of volatile matter Neither A nor B Helpful in estimation of its rank Both A and B The ratio of its percentage of fixed carbon to that of volatile matter Neither A nor B Helpful in estimation of its rank Both A and B ANSWER DOWNLOAD EXAMIANS APP
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