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Civil Engineering :: Water Supply Engineering

  1. The coefficient of permeability of soils, is generally expressed in

  2. A.
    cm/sec
    B.
    cm/minute
    C.
    cm2/sec
    D.
    cm2/minute.

  3. Pick up the correct statement from the following :

  4. A.
    Head loss in smaller size pipes at equal velocities, is less
    B.
    Cost of pumping is less in smaller size pipes
    C.
    Cost of smaller pipes is comparatively more
    D.
    None of these.

  5. Total flow in stream is known

  6. A.
    run off
    B.
    stream flow
    C.
    discharge
    D.
    all the above.

  7. Disinfection of drinking water is done to remove

  8. A.
    turbidity
    B.
    odour
    C.
    colour
    D.
    bacterias
    E.
    all the above.

  9. The ratio of total capacity and dead storage is kept

  10. A.
    8
    B.
    6
    C.
    4
    D.
    3
    E.
    2

  11. The U.C. (uniformity coefficient) for the best filter media sand should be

  12. A.
    2
    B.
    3
    C.
    4
    D.
    5
    E.
    none of these.

  13. Pick up the correct statement from the following :

  14. A.
    Deposition of calcium carbonate on the inside of the well pipe, causes incrustation of the pipe
    B.
    Incrustation of the pipe reduces the discharge
    C.
    Acidic waters cause corrosion of the pipes
    D.
    Corrosion results due to excessive withdrawal of sand along with water
    E.
    All the above.

  15. Specific yield of a well is

  16. A.
    quantity of water than can be drawn from the well
    B.
    flow of water per unit time
    C.
    total quantity of water available in the well
    D.
    quantity of water per unit time per unit draw-down.

  17. Normal values of overflow rate for plain sedimentation tanks in litres/hr/m2, generally range between

  18. A.
    100 to 250
    B.
    250 to 500
    C.
    500 to 750
    D.
    750 to 1000

  19. The formula for the head loss in conduits is generally known as

  20. A.
    Hazen-William's formula
    B.
    Manning's formula
    C.
    Darcy-Weisbach formula
    D.
    Nikuradse formula.