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Civil Engineering :: Water Supply Engineering

  1. Mud balls may be removed by

  2. A.
    breaking and washing
    B.
    washing the filter with a solution of caustic soda
    C.
    removing, cleaning and replacing the damaged sand
    D.
    all the above.

  3. For maximum alkalinity of water, pH value should be

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

  5. The fire demand for a city of 50, 000 population, according to Godrich formula, is

  6. A.
    40 mld
    B.
    42 mld
    C.
    44 mld
    D.
    48 mld.

  7. The efficiency of sedimentation tank does not depend upon

  8. A.
    depth of tank
    B.
    length of tank
    C.
    detention period
    D.
    velocity of water.

  9. When the reduced level of the water source is higher than the reduced level of the consumer's place, water is generally supplied

  10. A.
    by pumping system
    B.
    by gravitational system
    C.
    both (a) and (b)
    D.
    all the above.

  11. Most commonly used section in grade aqueducts, is

  12. A.
    circular
    B.
    rectangular
    C.
    parabolic
    D.
    horse shoe section.

  13. Pressure exerted at 90° bend in a pipe of cross-sectional area A and carrying water with a velocity V under a pressure p, is


  14. The lowest outlet sluice in a dam is provided

  15. A.
    below the dead storage
    B.
    on the top level of dead storage
    C.
    on the top level of useful storage
    D.
    at the centre of the dam.

  16. The four major water supply distribution systems, are

  17. 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.

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

  19. A.
    lakes
    B.
    ponds
    C.
    streams
    D.
    rivers
    E.
    sea.