Water Supply Engineering MCQs: Test Your Knowledge

Important Water Supply Engineering MCQs

Our comprehensive multiple-choice questions and answers library offers the perfect way to brush up your knowledge on Water Supply Engineering ( Civil Engineering ). Our content is constantly updated, helping you stay ahead of the curve and stay informed.


Water Supply Engineering is a branch of civil engineering that deals with the design, construction, and maintenance of systems and facilities for the collection, treatment, storage, and distribution of water for domestic, industrial, and irrigation purposes. It involves the study of hydrology, hydraulics, and water treatment processes, as well as the management and conservation of water resources. The goal of water supply engineering is to provide safe, reliable, and cost-effective water supply systems for communities and industries.

Q1. The first step in water treatment plant is

  • chlorination to kills microorganisms
  • fluoridation to prevents tooth decay
  • screening to removes large objects such as fish and twigs
  • aeration to removes unpleasant odour

Q2. Which of the following represents the physical characteristics of water?

  • Chloride content
  • BOD
  • Turbidity
  • COD

Q3. Biochemical Oxygen Demand (B.O.D.) of safe drinking water must be

  • nil
  • 5
  • 10
  • 15

Q4. Gravity conduits are generally in the form of

  • canals
  • flumes
  • aqueduct
  • all the above.

Q5. Pick up the incorrect statement from the following. The underground sources of water, is from

  • wells
  • springs
  • infiltration wells
  • storage reservoirs

Q6. The process of passing water through beds of granular materials, is called

  • Screening
  • Sedimentation
  • Filtration
  • None of these

Q7. 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.

Q8. Water losses in water supply, is assumed as

  • 0.075
  • 0.1
  • 0.225
  • 15%.

Q9. The efficiency of sedimentation tank does not depend upon

  • depth of tank
  • length of tank
  • detention period
  • velocity of water.

Q10. Which of the following instrument is used to measure turbidity?

  • Olfactometer
  • Turbidity meter
  • Colorimeter
  • Spectrophotometer

Q11. Corrosion of well pipes may not be reduced by

  • reducing the draw down and the pumping rate
  • reducing the flow velocity
  • using thicker pipes
  • using screens having larger area of openings

Q12. Average annual rainfall at any station is the average of annual rainfall over a period of

  • 14 years
  • 21 years
  • 28 years
  • 35 years

Q13. Sluice valves are fitted in a distribution system

  • along straight length of pipes at suitable intervals
  • at the junctions of the pipes
  • at the branching off points of sub-mains
  • all the above.

Q14. For centrifugal pumps

  • initial cost is low
  • limited space is required
  • the discharge obtained is steady and non-pulsating
  • all the above.

Q15. If pH value of water is

  • 7 water it is said to be neutral
  • less than 7 it is said to be acidic
  • more than 7 it is said to be alkaline
  • all the above.

Q16. Continuous flow of water can be expected from

  • gravity springs
  • surface springs
  • artesian springs
  • none of these.

Q17. Gravity conduits for carrying water from the source  are

  • canals
  • flumes
  • acqueducts
  • all the above.

Q18. 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

Q19. Hardness of water is caused due to

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

Q20. The maximum depth of sedimentation tanks is limited to

  • 3 m
  • 4 m
  • 5 m
  • 6 m.

Q21. A high velocity of wash water is required for

  • rapid gravity filter with strainers
  • rapid gravity filter without strainers
  • slow sand filter with strainers
  • slow sand filter without strainers

Q22. Corrosion of a pipe

  • reduces its life span
  • reduces its carrying capacity
  • adds colour to water
  • all the above.

Q23. The prescribed hardness limit of potable water ranges between

  • 50 to 75 P.P.M.
  • 75 to 115 P.P.M.
  • 150 to 200 P.P.M.
  • none of these.

Q24. How much is 1 decade

  • 1 year
  • 10 years
  • 100 years
  • 1000 years

Q25. Which method is used to measure the color of water?

  • Gravimetric analysis
  • Chromatography
  • Tintometer method
  • Hydrometer analysis

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Water Supply Engineering MCQs: Test Your Knowledge of Water Supply...: This page provides multiple-choice questions (MCQs) on water supply engineering, including topics such as water sources, filtration, treatment and distribution. It is an invaluable resource for practitioners, researchers and professionals alike.

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