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Civil Engineering :: Water Supply Engineering

  1. Asbestos pipes are

  2. A.
    light in weight and easy to transport
    B.
    highly resistant to corrosion
    C.
    high flexible to accommodate deflection upto 12°
    D.
    very much smooth and hydraulically efficient
    E.
    all the above.

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  3. The maximum depth of sedimentation tanks is limited to

  4. A.
    2 m
    B.
    3 m
    C.
    4 m
    D.
    5 m
    E.
    6 m.

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  5. By boiling water, hardness can be removed if it is due to

  6. A.
    calcium sulphate
    B.
    magnesium sulphate
    C.
    calcium nitrate
    D.
    calcium bicarbonate
    E.
    none of these.

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  7. Q is the discharge from an unconfined tube well with depression head s through its pipe of radius rw. If the radius of influence is R, the length of the required strainer, is

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  9. For determining the velocity of flow of underground water, the most commonly used non-empirical formula is

  10. A.
    Darcy's formula
    B.
    Slichter's formula
    C.
    Hazen's formula
    D.
    Lacy's formula.

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  11. The least thickness of class B cast iron (spun) pipe, is

  12. A.
    7.2 mm
    B.
    7.9 mm
    C.
    8.6 mm
    D.
    10 mm.

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  13. According to IS : 1172-1963, a minimum of 135 litres of water capita per day, is required for

  14. A.
    Boarding schools
    B.
    Nurses home and medical quarters
    C.
    hostels
    D.
    all the above.

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  15. The R.L. of ground water table on the sides of a valley is 1505 m whereas R.L. of the stream water is 1475 m. If 60° slope consists of pervious soil between R.L. 1485 m to 1500 m, the gravity spring may be expected at the point of reduced level

  16. A.
    1500 m
    B.
    1505 m
    C.
    1475 m
    D.
    1485 m.

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  17. The factor affecting per capita demand, is

  18. A.
    size of the city
    B.
    climatic conditions
    C.
    pressure in water mains
    D.
    cost of water
    E.
    all the above.

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  19. Pick up the incorrect statement from the following. The underground sources of water, is from

  20. A.
    wells
    B.
    springs
    C.
    infiltration wells
    D.
    storage reservoirs
    E.
    none of these.

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