MCQ
1621. 'Talus' is the soil transported by
Wind
Water
Glacier
Gravitational force
1622. The direct shear test suffers from the following disadvantage:
Drain condition cannot be controlled
Pore water pressure cannot be measured
Shear stress on the failure plane is not uniform
The area under the shear and vertical loads does not remain constant throughout the test
1623. Which of the following statements is correct?
Uniformity coefficient represents the shape of the particle size distribution curve.
For a well graded soil, both uniformity coefficient and coefficient of curvature are nearly unity.
A soil is said to be well graded if it has most of the particles of about the same size
None of the above
1624. The reduction in volume of soil due to squeezing out of water from the voids, is termed
Primary consolidation
Primary compression
Primary time effect
All the above
1625. The earth pressure of a soil at rest, is proportional to (where is the angle of internal friction of the soil)
tan (45°-)
tan (45°+)
tan2 (45°-)
None of these
1626. The maximum load carried by a pile, when it continues to sink without further increase of load, is known as
Ultimate load carrying capacity
Ultimate bearing capacity
Ultimate bearing resistant
All the above
1627. If e0, e 0' have their usual meanings, the coefficient of compressibility (ac), is given by
ac (e-e0)/(e'+e0')
ac (e0-e)/(-0')
ac (0')/(e0-e)
ac (0'-)/(e-e0)
1628. Which of the following methods is more suitable for the determination of permeability of clayey soil?
Constant head method
Falling head method
Horizontal permeability test
None of the above
1629. The specific gravity of Calcite is
2.65
2.72
2.85
2.90
1630. Which of the following methods is most accurate for the determination of the water content of soil?
Oven drying method
Sand bath method
Calcium carbide method
Pycnometer method
1631. The clay mineral with the largest swelling and shrinkage characteristics is
Kaolinite
Illite
Montmorillonite
None of the above
1632. If the bulk density of the soil is and water content, then dry density of the soil, is
1+/
(1+)/
/(1+)
/(1+)
1633. The length/diameter ratio of cylindrical specimens used in triaxial test, is generally
1
1.5
2
2.5
1634. In a flow net
Flow lines and equipotential lines cross each other at right angles
Fields are rectangles whose length is twice the breadth
Smaller the dimensions of the field, smaller will be the hydraulic gradient and velocity of flow through it
For homogeneous soil, the curves are smooth and circular
1635. The seepage exit gradient in a soil is the ratio of
Total head to the length of seepage
Flow line to slope
Head upstream to that at downstream
Head loss to the length of the seepage
1636. Select the correct statement.
Coefficient of compressibility of an over- consolidated clay is less than that of a normally consolidated clay
Coefficient of compressibility of an over- consolidated clay is greater than that of a normally consolidated clay
Coefficient of compressibility is constant for any clay
None of the above
1637. Pick up the correct statement from the following:
The void space between the soil grains, is filled partly with air and partly with water
In perfectly saturated soil, the voids are completely filled with water
In dry soil, the voids are completely filled with air
All the above
1638. If the specific gravity and voids in soil sample are G and e respectively, the hydraulic gradient i, is
(G-1)/(1+e)
(G+1)/(1-e)
(1-G)/(1+e)
(1+G)/(1+e)
1639. A soil sample of mass specific gravity 1.92 has moisture content 30%. If the specific gravity of solids is 2.75, the void ratio, is
0.858
0.860
0.862
0.864
1640. The water content of soil, which represents the boundary between plastic state and liquid state, is known as
Liquid limit
Plastic limit
Shrinkage limit
Plasticity index