Fuels and Combustion Function of secondary air in pulverised coal firing is to Reduce primary air requirement Transport the coal to the burner Ensure efficient burning of coal around the burner Dry the coal Reduce primary air requirement Transport the coal to the burner Ensure efficient burning of coal around the burner Dry the coal ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Pure carbon is completely burnt in oxygen. The flue gas analysis is 70%CO₂, 20%CO and 10%O₂. The percent excess oxygen used is 20 0 10 12.5 20 0 10 12.5 ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Incomplete combustion of fuel in the furnace is judged by high __________ of the flue gases. Dew point CO₂ content CO content O₂ content Dew point CO₂ content CO content O₂ content ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Tar yield in the low temperature and high temperature carbonisation of dry coal may be respectively __________ percent. 10 & 20 3 & 10 10 & 3 15 & 8 10 & 20 3 & 10 10 & 3 15 & 8 ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Higher percentage of ash in coal meant for the production of metallurgical grade coke None of these Decreases the hardness of coke Causes brittleness in steel Decreases the abrasion resistance of coke None of these Decreases the hardness of coke Causes brittleness in steel Decreases the abrasion resistance of coke ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Artificial draught produced by a fan can be controlled by the Damper Variation in the pitch of the fan blades All of these Speed of the fan Damper Variation in the pitch of the fan blades All of these Speed of the fan ANSWER DOWNLOAD EXAMIANS APP
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