MCQ PracticePresence of SO 2 in furnace gases attacks the ferrous metal by way ofSubject: Chemical EngineeringTopic: Furnace TechnologyAAccelerating the rate of scalingBCausing metal embrittlementCAttacking the grain boundaries; particularly severe on low carbon and nickel bearing steels at high temperatureDAll of the aboveCorrect Answer: DPractice 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