Waste Water Engineering Questions

• In circular sewers if depth of flow is 0.2 times the full depth, the nominal gradient,
• Imhoff cone is used to measure
• If q is the average sewage flow from a city of population P, the maximum sewage flow
• The rainfall at any place may be determined by
• PH value of sludge during alkaline regression stage, is
• The average temperature of sewage in India, is
• The first stage of neutral process of sludge digestion, is
• The moisture content of a sludge is reduced from 90% to 80% in a sludge digestion tank. The percentage decrease in the volume of sludge, is
• The use of coarse screens for the disposal of sewage, may be dispensed with by
• If the depth of flow in a circular sewer is 1/4th of its diameter D, the wetted perimeter is
• For large sewers, maximum distance between manholes may be
• Pick up the correct statement from the following :
• In trickling filter, B.O.D. is reduced to
• Primary treatment of sewage consists of removal of
• The pH value of sewage is determined with the help of
• Stoneware sewers are available in size
• Inter-distance between ventilation columns in a sewer line is kept
• Ventilating shafts are provided to a sewer line at every
• For the open drain (N = 0.025) shown in the below figure, the discharge is
• The sewer which resists sulphide corrosion, is