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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.

  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.

  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.

  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


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

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

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

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

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

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

  14. 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

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

  16. The factor affecting per capita demand, is

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

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

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