Water And Wastewater Engineering Set 12

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This set of Water and Wastewater Engineering Multiple Choice Questions & Answers (MCQs) focuses on Water And Wastewater Engineering Set 12

Q1 | Manholes along the mains from the source to a city are provided at 500 m intervals in
  • Steel pipes
  • R.C.C. pipes
  • Hume steel pipes
  • All the above
Q2 | The maximum permissible colour for domestic supplies based on cobalt scale, is
  • 5 ppm
  • 10 ppm
  • 15 ppm
  • 20 ppm
Q3 | Increase in population of a rapidly growing city, may be estimated by
  • Arithmetical mean method
  • Geometrical method
  • Incremental increase method
  • Graphical comparison method
Q4 | Per capita demand of water is calculated in litres
  • Per person per day
  • Per person per month
  • Per person per year
  • None of these
Q5 | Hard water for public water supply is discarded because
  • ) It consumes more soap
  • It contains lot of turbidity
  • It contains pathogenic bacterias
  • It possesses bad taste and odour
Q6 | Pick up the incorrect statement from the following:
  • Iron salts produce heavy flocks and hence remove more suspended matter
  • Iron salts remove hydrogen sulphides
  • Iron salts can be used over a limited range of pH values
  • Iron salts impart corrosiveness to water
Q7 | Asbestos pipes are
  • Light in weight and easy to transport
  • Highly resistant to corrosion
  • High flexible to accommodate deflection upto 12°
  • All the above
Q8 | A strainer type well sunk through three previous layers intervened by three imperviousaquicludes, draws water from
  • Top most pervious layer
  • Central pervious layer
  • Lowest pervious layer
  • All the pervious layers
Q9 | Runoff is the quantity of water which flows
  • In sewer pipes
  • Due to leakage in pipes
  • In rivers
  • None of these