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Civil Engineering :: Water Supply Engineering

  1. The most ideal disinfectant used for drinking water throughout the world, is

  2. A.
    alum
    B.
    lime
    C.
    chlorine
    D.
    nitrogen
    E.
    ammonia.

  3. A centrifugal pump is required to be primed before starting if it is located

  4. A.
    at higher level than water level of reservoir
    B.
    at lower level than water level of reservoir
    C.
    both (a) and (b)
    D.
    neither (a) nor (b).

  5. The maximum pressure which the pipe can withstand without any leakage during hydrostatic pressure test, is called

  6. A.
    Working pressure
    B.
    Design pressure
    C.
    Test pressure
    D.
    Hydrostatic pressure.

  7. Filtration of water is done to remove

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

  9. Generally, first portion of a logistic curve for the population growth of a developing city, represents the growth of

  10. A.
    increasing
    B.
    decreasing
    C.
    constant
    D.
    all the above.

  11. Ground water from artesian wells

  12. A.
    contains no suspended materials
    B.
    contains dissolved salts
    C.
    may be saltish and hard
    D.
    generally require lesser treatment
    E.
    all the above.

  13. Property of earth to allow water to pass through it, is known as

  14. A.
    perviousness
    B.
    porosity
    C.
    permeability
    D.
    transmissibility.

  15. Derivation of Thiem's formula
    is based on the assumption

  16. A.
    the aquifer is homogeneous, isotropic and of infinite depth and area
    B.
    the well is sunk through the full depth of the aquifer
    C.
    the flow lines are radial and horizontal, and the flow is laminar
    D.
    for hydraulic gradient in Darcy's equation, tangent value is used for sine value
    E.
    all the above.

  17. Pick up the incorrect statement from the following :

  18. A.
    Porosity of clay sand soil is 45%
    B.
    Porosity of pure sand is 35%
    C.
    Porosity of sand stone is up to 15%
    D.
    Least porosity is that of granite and quartz
    E.
    None of these.

  19. Water is supplied from the source to the treatment plant under gravity in

  20. A.
    Calcutta
    B.
    Delhi
    C.
    Madras
    D.
    Bombay.