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Civil Engineering :: Water Supply Engineering

  1. The ratio of the maximum daily consumption to the average daily demand, is

  2. A.
    1.0
    B.
    1.2
    C.
    1.4
    D.
    1.6
    E.
    1.8

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  3. The ratio of discharge and plan area of a continuous flow type settling tank, is known

  4. A.
    surface loading
    B.
    overflow
    C.
    overflow rate
    D.
    all the above.

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  5. Pick up the correct statement from the following :

  6. A.
    At a particular speed of operation, the head produced decreases with the increase of discharge
    B.
    At zero discharge, discharge valve remaining closed, the head developed is maximum which is known as shut-off head
    C.
    At a particular speed the discharge at which efficiency of a pump is maximum, is known as normal discharge
    D.
    The brake horse power required from the primemover to drive the pump, increases with the increase of discharge
    E.
    all the above.

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  7. The maximum pressure to which a pipe is subjected to during its operation, is known

  8. A.
    working pressure
    B.
    design pressure
    C.
    test pressure
    D.
    pipe pressure
    E.
    all the above.

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  9. To control the growth of algae in reservoirs, the compound which is used, is

  10. A.
    bleaching powder
    B.
    copper sulphate
    C.
    lime solution
    D.
    alum solution
    E.
    all the above.

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  11. Pick up the wrong nominal internal diameter of cast iron (spun) pipes in mm from the following :

  12. A.
    300
    B.
    400
    C.
    500
    D.
    550
    E.
    600

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  13. Hardness of water can be removed by boiling if it is due to

  14. A.
    calcium bicarbonates
    B.
    calcium sulphates
    C.
    calcium chloride
    D.
    calcium nitrates.

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  15. A well is considered to be good if it is sunk into

  16. A.
    Clay
    B.
    Sand
    C.
    Coarse gravel
    D.
    Silt.

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  17. The nitrate concentration in domestic water supplies, is generally limited to

  18. A.
    10 ppm
    B.
    15 ppm
    C.
    25 ppm
    D.
    30 ppm
    E.
    45 ppm.

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  19. Sluice valves in main water supplies

  20. A.
    are used to regulate the flow of water in pipes
    B.
    are spaced about 5 km apart
    C.
    are usually placed at the summits
    D.
    all the above.

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