Schedule of Rates for Water Supply works MCQ

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• The per capita sewage generation can be considered as 35 to 50% of the per capita water supplied per day.
  ক

  True

  খ

  False
• Fluctuation in flow occurs from hour to hour and from season to season.
  ক

  True

  খ

  False
• Disinfection of drinking water is done to remove odour.
  ক

  True

  খ

  False
• What is the diameter of a domestic sewer pipe laid at gradient 1 in 100?
  ক

  150 mm

  খ

  250 mm

  গ

  120 mm

  ঘ

  80 mm
• What is the detention period in a septic tank?
  ক

  24 hours

  খ

  12 hours

  গ

  06 hours

  ঘ

  36 hours
• Cost of fittings and their fixing is specified for the following sanitary fittings.
  ক

  Water closets

  খ

  Flushing pipes

  গ

  Lavatory basins

  ঘ

  Water closets, Flushing pipes and lavatory basins
• Pick up the correct statement in case of water supply.
  ক

  Pipes laid in trenches and pipes fixed to walls are measured separately

  খ

  Cutting through walls and floors are included with the item

  গ

  Pipes are classified according to their sizes and quality

  ঘ

  Pipes laid in trenches, cutting through walls and pipes classified as per size
• A city has a projected population of 60,000 spread over area of 50 hectare. Find the design discharge for the separate sewer line by assuming rate of water supply of 250 LPCD and out of this total supply only 75 % reaches in sewer as wastewater. Make necessary assumption whenever necessary.
  ক

  0.26 m3/s

  খ

  0.6 m3/s

  গ

  0.76 m3/s

  ঘ

  3.26 m3/s
• The future period for which the provision is made in designing the capacities of the various components of the sewerage scheme is known as the ______________
  ক

  Design period

  খ

  Manufacture time

  গ

  Construction work

  ঘ

  Repair work
• Which among the following quantity is considered while estimating the sewage quantity?
  ক

  Addition due to unaccounted private water supplies

  খ

  Addition due to infiltration

  গ

  Subtraction due to water losses

  ঘ

  Addition due to unaccounted private water supplies, infiltration and water losses
• Turbidity of raw water is a measure of _____________
  ক

  Suspended solids

  খ

  Acidity of water

  গ

  B.O.D

  ঘ

  Repair Work
• As per IS: 1172-1963, water required per head per day for average domestic purposes, is?
  ক

  120 litres

  খ

  135 litres

  গ

  75 litres

  ঘ

  195 litres