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  • Question

  • For maximum alkalinity of water, pH value should be


  • Options
  • A. zero
  • B. less than 7
  • C. more than 7
  • D. 14
  • E. 21

  • Correct Answer
  • 14 

    • Water Supply Engineering problems

    Search Results

    • 1. Standard process of chlorination of water, is done by

    • Options
    • A. plain chlorination
    • B. pre-chlorination
    • C. post-chlorination
    • D. double chlorination.
      • Discuss
    • 2. The permissible pH value for public water supplies may range between

    • Options
    • A. 4.5 to 5.5
    • B. 5.5 to 6.5
    • C. 6.5 to 8.5
    • D. 8.5 to 10.5
    • E. none of these.
      • Discuss
    • 3. The maximum permitted loss of head in a rapid sand filter, is

    • Options
    • A. 1 m
    • B. 2 m
    • C. 3 m
    • D. 4 m
    • E. 5 m.
      • Discuss
    • 4. The cast iron pipes for water supply system are used for

    • Options
    • A. durability
    • B. strength
    • C. easy connection
    • D. low maintenance cost
    • E. all the above.
      • Discuss
    • 5. For centrifugal pumps

    • Options
    • A. initial cost is low
    • B. limited space is required
    • C. the discharge obtained is steady and non-pulsating
    • D. all the above.
      • Discuss
    • 6. The strainer type tube well, is unsuitable for

    • Options
    • A. coarse gravels
    • B. fine sandy strata
    • C. clean gravels
    • D. none of these.
      • Discuss
    • 7. The four major water supply distribution systems, are

    • Options
    • A. dead end, tree, grid iron and reticulation
    • B. dead end, tree, grid iron and circular
    • C. tree, grid iron, ring and radial
    • D. tree, reticulation, circular and ring.
      • Discuss
    • 8. Critical time for developing a water hammer, is the time required for

    • Options
    • A. closing the valve
    • B. the wave to travel from valve to the reservoir
    • C. the wave to travel from the valve to the reservoir and back
    • D. none of these.
      • Discuss
    • 9. Maximum threshold number permitted for indicating the odour of public water supplies, is

    • Options
    • A. 1
    • B. 2
    • C. 3
    • D. 4
    • E. 5
      • Discuss
    • 10. In the equation of a logistic curve of population growth, the constant m is

    • Options
    • A. Ps x P
    • B.
    • C.
    • D. KPs .
      • Discuss

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