Water Supply Engineering Quiz | Water Supply Engineering Short Questions and Answers

41 Corrosion of well pipes may not be reduced by

[A] reducing the draw down and the pumping rate

[B] reducing the flow velocity

[C] using thicker pipes

[D] using screens having larger area of openings

Answer: using screens having larger area of openings

42 In distribution pipes, drain valves are provided at

[A] lower point

[B] higher point

[C] junction points

[D] any where

Answer: lower point

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43 A high velocity of wash water is required for

[A] rapid gravity filter with strainers

[B] rapid gravity filter without strainers

[C] slow sand filter with strainers

[D] slow sand filter without strainers

Answer: rapid gravity filter without strainers

44 The maximum permissible nitrites in public water supplies, is

[A] 0.5 P.P.M.

[B] 1.0. P.P.M.

[C] 1.5 P.P.M.

[D] Nil

Answer: Nil

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