Home / Civil Engineering / Soil Mechanics and Foundation Engineering :: Section 4

Civil Engineering :: Soil Mechanics and Foundation Engineering

  1. The zero atmospheric pressure is at

  2. A.

    sea level

    B.

    mean sea level

    C.

    water table

    D.

    phreatic surface

    E.

    both (c) and (d) of the above.


  3. A soil mass coated with a thin layer of paraffin weighs 460 g. When immersed, it displaces 299 cc of water. The weight of paraffin is 10 g. If specific gravity of solids is 2.5 and that of paraffin 0.9, the void ratio of soil, is

  4. A.

    0.55

    B.
    0.60
    C.

    0.65

    D.

    0.70


  5. Pick up the incorrect definition from the following:

  6. A.

    Ratio of the compressive strength of unconfined undisturbed soil to that of remoulded soil, is known as the sensitivity of the soil sample

    B.

    The rotation of soil particles into stable state while remoulding, is known as the thiostropy of soil

    C.

    The water content at which a soil changes from the liquid state to solid state, is known liquid limit of the so

    D.

    The water content at which a soil flows, is known plastic limit of the soil

    E.

    None of these.


  7. In a fow net

  8. A.
    flow lines and equipotential lines cross each other at right angles
    B.

    fields are rectangles whose length is twice the breadth

    C.
    smaller the dimensions of the field, smaller will be the hydraulic gradient and velocity of flow through it
    D.

    for homogeneous soil, the curves are smooth and circular.


  9. The ratio of the volume of water present in a given soil mass to the total volume of its voids, is known

  10. A.

    porosity

    B.

    void ratio

    C.

    percentage voids

    D.

    degree of saturation.


  11.  

    Stoke's law does not hold good if the size of particle is smaller than

  12. A.
    0.0002 mm
    B.
    0.002 mm
    C.
    0.02 mm
    D.
    0.2 mm

  13. In a purely cohesive soil, the critical centre lies at the intersection of

  14. A.

    perpendicular bisector of slope and the locus of the centre

    B.

    perpendicular drawn at l/3rd slope from toe and the locus of the centre

    C.

    perpendicular drawn at 2/3rd slope from toe and the locus of the centre

    D.
    directional angles
    E.

    none of these.


  15.  

    The angle of internal friction, is least for

  16. A.

    angular-grained loose sand

    B.

    angular -grained dense sand

    C.
    round-grained loose sand
    D.

    round-grained loose sand

    E.

    clays.


  17.  

    In non-cohesive soil in passive state of plastic equilibrium

  18. A.
    major principal stress is horizontal
    B.

    minor principal stress is vertical

    C.

    major principal stress is vertical

    D.

    minor and major principal stresses are equally inclined to the horizontal.


  19. In active state of plastic equilibrium in a non cohesive soil with horizontal ground surface

  20. A.
    major principal stress is horizontal
    B.

    minor principal stress is vertical

    C.

    major principal stress is vertical

    D.

    minor and major principal stresses are equally inclined to horizontal.