Waste Water Engineering Questions

• For laying a sewer line in a trench of 2 m width, an offset line is marked on the ground parallel to the given centre line at a distance of
• The spacing of man holes along a straight portion of a sewer is 300 m, the diameter of the sewer may be
• The grit and silt of the grit chambers, may not be used for
• The settling velocity of a spherical particle of diameter less than 0.1 mm as per Stock's law, is
• In areas where light rains are uniformly distributed throughout the year, the type of sewerage system to be adopted is
• The intensity of rain is expressed in
• The rate of accumulation of sludge per person per year, is
• The formula used for determining flow velocities in sewers, is known as
• The most efficient cross section of sewers in a separate sewerage system is
• If a 2% solution of sewage sample is incubated for 5 days at 20°C and the dissolved oxygen depletion was found to be 8 mg/l. The BOD of the sewage is
• The formula which accepts the value of rugosity coefficient n = 0.012 to be used in Manning's formula, is given by
• Pick up the incorrect statement from the following for allowing workers to enter sewers
• In a grit chamber of a sewage treatment plant,
• The quantity of liquid waste which flows in sewers during the period of rainfall, is known
• For detecting the nitrates in sewage, the colour may be developed by adding
• The value of Chezy's constant is used in
• 1000 kg of sewage contains
• The disintegrating pump in which solid matter is broken up before passing out, is
• The most efficient cross-section of sewers in a combined sewerage system is
• In a sludge tank, the gas mainly produced, is