Soil Mechanics and Foundation Engineering (Part-2) (General Engineering) (SSC JE)

Total Questions: 50

1. Coarse grained soils are best compacted by a : [RRB JE 27.08.2015 (Shift-II) ]

Correct Answer: (d) Vibratory roller
Solution:

Coarse grained soil are best compacted by vibratory rollers.

2. Inorganic soil with low compressibility is represented by– [RRB JE 27.08.2015 (Shift-III) ]

Correct Answer: (c) ML
Solution:

ML = Inorganic silt of low plasticity
CL = Inorganic clay of low to medium plasticity
OL = Organic silt of low plasticity
MH = Inorganic silt of high plasticity
CH = Inorganic clay of high plasticity
OH = Organic clay of high plasticity

3. The ratio of volume of voids to the total volume of soil mass is called [RRB JE 27.08.2015 (Shift-I) ]

Correct Answer: (b) Porosity
Solution:

4. Relative density of compacted dense sand is approximately equal to [RRB JE 27.08.2015 (Shift-I) ]

Correct Answer: (b) 0.95
Solution:

The relative density of a soil gives a more clay idea of the denseness than does the void ratio.

5. Consistency as applied to cohesive soils is an indicator of its– [RRB JE 28.08.2015 (Shift-I) ]

Correct Answer: (c) Shear strength
Solution:

Consistency as applied to cohesive soils is an indicator of its shear strength.
• Shear strength is the capacity to resist shear stress.
• Shear strength is the resistance to shear deformation. It is categorized into two broad categories :
(i) friction strength,
(ii) cohesive strength.

6. The equation of flownets drawn for plotting the flow of a fluid is based on [RRB S.S.E. 01.09.2015 (Shift-II) ]

Correct Answer: (d) Darcy's law
Solution:

Flownets–
 • The equation of flownets drawn for plotting the flow of a fluid is based on Darcy's law. • A flownet is a graphical solution to the equation of steady groundwater flow. A flownet consists of two sets of lines which must always be orthogonal (perpendicular to each other).
• Flow lines, and equipotential lines (lines of constant head) which show the distribution of potential energy.
• Flow net depends upon boundary condition, and not on the permeability of soil. Flownet can be used to be determine–
1- Seepage discharge
2- Seepage pressure
3- hydrostatic pressure (uplift pressure)
4- Exit gradient

7. A soil having particles of nearly the same size is known as– [RRB JE 28.08.2015 (Shift-I) ]

Correct Answer: (b) Uniformly graded
Solution:

Well graded soil–
 • The soil may be termed as well graded soil if it has good representation of all size of particle in it.

Uniformly graded–It consist excess of one size of particle.

Gap graded–It certain size of particles are missing from soil.

8. A line which shows the water content dry density relation for the compacted soil containing no air voids is known as [RRB S.S.E. (Secunderabad) 02.09.2015 (Shift-I) ]

Correct Answer: (b) Zero-air voids line
Solution:


• The line showing the relationship between water content and dry density of compacted soil at 0% of air voids is called zero air void line.

9. Which of the following list of pile types is not a representation based on the functioning of the pile [RRB S.S.E. (Secunderabad) 02.09.2015 (Shift-I) ]

Correct Answer: (d) H-pile
Solution:

Classification of pile on the basis of functioning (use)–
1. Load bearing pile (ex. end bearing pile, friction pile)
2. Compaction pile
3. Tension pile
4. Sheet pile
5. Fender pile
6. Anchor pile
7. Batter piles
8. Laterally loaded piles Base on material and composition
1. Concrete pile
2. Timber pile
3. Steel pile → (a) H-piles

10. Liquid limit of a soil indicates its- [RRB JE 28.08.2015 (Shift-III) ]

Correct Answer: (a) Compressibility
Solution:

• Liquid limit of a soil indicate its compressibility.
• Soil with higher liquid limit is more plastic and have higher compressibility.
• All soil at liquid limit have same shear length.