Fuels and Combustion With increase in the time of carbonisation at a particular temperature (say 1000°C), the __________ percentage in coke oven gas increases. Methane All of these Unsaturated hydrocarbons Hydrogen Methane All of these Unsaturated hydrocarbons Hydrogen ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Main use of hard coke produced by high temperature carbonisation is in the Sinter making Cupola in foundaries Domestic ovens Iron blast furnace Sinter making Cupola in foundaries Domestic ovens Iron blast furnace ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion The function of secondary combustion air is to Pneumatically convey the pulverised coal Burn the lumpy coal None of these Completely burn the volatile matter Pneumatically convey the pulverised coal Burn the lumpy coal None of these Completely burn the volatile matter ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Correct viscosity of furnace oil at the burner tip for proper atomisation is about 25 centistokes. To reduce the viscosity of high viscosity furnace oil (250 centistokes) to the correct atomisation viscosity (i.e. 25 cst), it should be preheated to about____°C. 85 145 70 105 85 145 70 105 ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Undercharging of coal in the by-product coke ovens results in No change in the c.v. of coke oven gas Increase in its throughput Increase in the c.v. of coke oven gas Decrease in the c.v. of coke oven gas No change in the c.v. of coke oven gas Increase in its throughput Increase in the c.v. of coke oven gas Decrease in the c.v. of coke oven gas ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Function of secondary air in pulverised coal firing is to 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 Transport the coal to the burner Dry the coal Ensure efficient burning of coal around the burner ANSWER DOWNLOAD EXAMIANS APP
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