Quiz  /  Water Supply Engineering Gate & PSU MCQ Questions With Answers

  • 1. 
    Which of these particles is NOT able to pass through a sand, gravel, and charcoal filter?

  • bacteria
  • water
  • viruses
  • large piece of dirt

  • 2. 
    Water softeners will remove nearly all the ________and _________ from the raw water during the softening process.

  • Calcium and magnesium
  • Chlorine and magnesium
  • BOD and COD
  • Cation and anion

  • 3. 
    What is added during coagulation process in water treatment plant

  • alum and slaked lime
  • florida
  • chlorine
  • calcium carbonate

  • 4. 
    Most important source of water for public water supply, is from

  • lakes
  • ponds
  • streams
  • rivers

  • 5. 
    How much quantity of water is required for domestic use

  • 135 l/h/d
  • 220 l/h/d
  • 50 l/h/d
  • 30 l/h/d

  • 6. 
    What is the equivalent weight (EW) of Al2(SO4)3?

  • 114 g/mole.
  • 342 g/mole.
  • 171 g/mole.
  • 102 g/mole.

  • 7. 
    The function of intake structures is__________

  • To lift the water from the source of water
  • To deliver the treated water from treatment plant
  • To deliver the water for distribution from source to treatment plant
  • To collect the water from the surface source

  • 8. 
    Minamata disease is a neurological syndrome caused by?

  • Lead poisoning
  • Cadmium poisoning
  • Selenium poisoning
  • Mercury poisoning

  • 9. 
    Rapid gravity filter can only remove turbidity of water upto

  • 15 to 25 gm/litre
  • 25 to 30 gm/litre
  • 30 to 35 cm/litre
  • 35 to 40 gm/litre

  • 10. 
    Hardness of water is caused due to

  • calcium sulphate
  • magnesium sulphate
  • calcium nitrates
  • calcium bicarbonates
  • all the above.

  • 11. 
    Water losses in water supply, is assumed as

  • 0.075
  • 0.1
  • 0.225
  • 15%.

  • 12. 
    At the socket and spigot joint,

  • enlarged end of the pipe is called socket
  • normal end of the pipe is called spigot
  • spigot is fitted into the socket
  • all the above.

  • 13. 
    The maximum depth of sedimentation tanks is limited to

  • 2 m
  • 3 m
  • 4 m
  • 5 m
  • 6 m.

  • 14. 
    Given the approximate alkalinity of a water sample to be 100 mg/L as CaCO3, what is the exact alkalinity, if the pH of the water sample is 7.5?

  • 101.35
  • 110.25
  • 98.65
  • 1.35

  • 15. 
    Which method is used to measure the color of water?

  • Gravimetric analysis
  • Chromatography
  • Tintometer method
  • Hydrometer analysis

  • 16. 
    An impaired water can be physically identified through the following, EXCEPT ___________.

  • Its odour.
  • Its pH.
  • Its turbidity.
  • Its colour.

  • 17. 
    The following are the sources of alkalinity, except:

  • Carbonate (CO32-)
  • Bicarbonate (HCO3-)
  • Hydroxides (OH-)
  • Chlorides (Cl¯)

  • 18. 
    Service connections to consumers houses, are generally provided with

  • copper pipes
  • hume pipes
  • galvanised iron pipes
  • P.V.C. pipes

  • 19. 
    The period of cleaning of a slow sand filter, is usually

  • 5 to 10 days
  • two weeks to three weeks
  • one month to three months
  • three months to six months

  • 20. 
    Below are methods of water distribution systems EXCEPT

  • Combine gravity and pumping system
  • Radial System
  • Pumping System
  • Gravity System

  • 21. 
    What causes hardness in water?

  • Calcium
  • Arsenic
  • Mercury
  • Rhodium

  • 22. 
    The permissible concentration of PM 10 in the air is ___________

  • 60μg/m3
  • 40μg/m3
  • 50μg/m3
  • 20μg/m3

  • 23. 
    Hard water contains

  • calcium
  • magnesium bicarbonates
  • magnesium sulphate
  • all the above.

  • 24. 
    The maximum hourly consumption, is generally taken as

  • 1.1
  • 150%.
  • 1.4
  • 1.2
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