MCQ PracticeThe principal gas evolved from sludge digestion tank isSubject: Chemical EngineeringTopic: Environmental Engineering In CeACOBCO 2CCH 4DN 2Correct 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