Water Supply Engineering Short Questions and Answers

Questions

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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