The organic impurities in water form a layer on the top of a filtering media. Such a layer is called

Related MCQs

• Colloidal impurities if associated with organic matter having bacterias becomes the chief source of
• Suspended impurities cause turbidity in water.
• The void spaces in the filtering material act like a
• Suspended impurities consist of
• Dissolved impurities consist of
• In a plain sedimentation tank, under normal conditions, impurities are removed upto
• Suspended impurities include
• The amount of oxygen required for the biological decomposition of dissovled organic solids to occur under aerobic conditions is called bio-chemical oxygen demand (B.O.D.)
• The amount of water collected in a reservoir is divided into three portions and the order of their existance from bottom to the top is
• Grit chambers are used to remove sand and other organic matter from sewage.