MCQ PracticeIn practical operation of any furnace, zero oxygen percentage or theoretical CO 2 percentage in flue gas is rarely achieved, because ofSubject: Chemical EngineeringTopic: Furnace TechnologyAUse of non-preheated combustion airBUse of pulverised solid fuelsCImperfect mixing of fuel & air and infiltration of airDUse of excessive positive draft in the furnaceCorrect Answer: CPractice QuizBack to MCQsRelated MCQsCurrent flows in a circuit whenEighttenths coulomb passes a point in 4 s. The current in amperes isThe unit of electrical charge is the