MCQ
121. For general engineering purposes, soils are classified by
Particle size classification system
Textural classification system
High Way Research Board (HRB), classification system
Unified soil classification system
122. Pick up the correct statement from the following:
An unconfined compression test is a special case of triaxial compression test
An unconfined compression test is a special case of direct shear test
The confining pressure is maximum during an unconfined compression test
The cylindrical specimen of a soil is subjected to major principal stress till it fails due to shearing along the plane of the failure
123. 'Talus' is the soil transported by
Wind
Water
Glacier
Gravitational force
124. Through a point in a loaded soil mass, there exists typical planes mutually orthogonal on which the stress is wholly normal and no shear stress acts, if is
1
2
3
4
125. On wetting, cohesive soils,
Loose permeability
Gain shear strength
Loose elasticity
Decrease their shear strength
126. 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
127. 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
128. 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
129. Contact pressure beneath a rigid footing resting on cohesive soil is
Less at edges compared to middle
More at edges compared to middle
Uniform throughout
None of the above
130. Pick up the correct statement from the following:
Sandy clayloam contains highest percentage of sand
Silty clayloam contains highest percentage of silt
Stiff boulder clay offers maximum shear strength
Soft chalk carries least safe load
131. A soil sample of mass specific gravity 1.92 has moisture content 30%. If the specific gravity of solids is 2.75, the degree of saturation, is
95.4%
95.5%
95.6%
95.7%
132. The phreatic line in an earth dam may be
Circular
Elliptical
Parabolic
A straight line
133. 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
134. Select the correct range of density index, ID
ID > 0
ID < 0
0 < ID < 1
0 < ID < 1
135. Water content of soil can
Never be greater than 100%
Take values only from 0% to 100%
Be less than 0%
Be greater than 100%
136. 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
137. 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)
138. The plasticity of fine soils may be assessed by means of
Dry strength test
Toughness test
Dilatancy test
All of these
139. Pick up the correct statement from the following:
Failure plane carries maximum shear stress
Failure plane does not carry maximum shear stress
Failure plane carries shear stress equal to maximum shear stress
None of these
140. 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