Waste Water Engineering Questions

• In detritus tanks,
• Assertion (A) : The determination of pH value of sewerage is important. Reason (R) : The efficiency of certain treatment methods depends upon the availability of pH value.
• With self cleansing velocity in sewers
• Stone ware pipes are
• If γw is the unit weight of water, r the hydraulic mean depth of the sewer and S the bed slope of the sewer, then the tractive force exerted by flowing water, is
• Skimming tanks are
• The sewage treatment in septic tanks is due to
• The width of a settling tank with 2 hour detention period for treating sewage 378 cu m per hour, is
• D is the diameter of a circular sewer and α is the side of a square section sewer. If both are hydraulically equivalent, the relationship which holds good, is
• Boussinesq's equation for ascertaining unit pressure at a depth H on sewers due to traffic loads, is
• Before discharging the foul sewage into rivers, it is generally treated by
• Oxidation process results in the formation of
• If the diameter of a sewer is 100 mm, the gradient required for generating self cleansing velocity, is
• As compared to fresh river water, sea water contains oxygen
• Which one of the following resists hydrogen sulphide corrosion
• Dry weather flow is :
• In 1000 kg of sewage, the total solids approximate
• If D.O. concentration falls down to zero in any natural drainage, it indicates the zone of
• In a sludge digestion tank if the moisture content of sludge V1 litres is reduced from p1 % to p2 % the volume V2 is
• The settlement velocity of a solid (diameter 0.5 mm, specific gravity 1.75) in water having temperature 10°C, is