MCQ PracticeInsufficient washing of sand grains in a rapid sand filter causesSubject: Chemical EngineeringTopic: Environmental Engineering In CeAAir bindingBShrinkage of filtering mediaCMud ballsDExpansion of filtering mediaCorrect 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