771Mechanical EngineeringMedium
Tertiary air is the air used to________?
Asupply air for ignitors
Btransport and dry the coal
Cconvert CO (formed in lower zone of furnace) into C02 at higher zone
Dprovide air around burners for obtaining optimum combustion
Ecool the scanners
Correct answer
C. convert CO (formed in lower zone of furnace) into C02 at higher zone
Explanation
The correct answer is convert CO (formed in lower zone of furnace) into C02 at higher zone.