Exam Details
| Subject | Soil Mechanics and Foundation Engineering | |
| Paper | ||
| Exam / Course | Diploma in Civil Engineering (DCLE - G) | |
| Department | School of Engineering & Technology (SOET) | |
| Organization | indira gandhi national open university | |
| Position | ||
| Exam Date | December, 2015 | |
| City, State | new delhi, |
Question Paper
1. Choose the correct alternative
The particle size distribution of soil is carried out by the following test
Core Cutter method
Sieve Analysis
Pycnometermethod
All of the above
Specific gravity of a soil sample is 2·60. If the void ratio of the soil is 0.30, the dry density of the soil will be
2·6 g/cc
1·3 g/cc
2 g/cc
1 g/cc
Shear strength of the soil depends upon
Cohesion
Angle of shearing resistance
Interlocking of particles
All of the above
The moisture absorbed by soil from atmosphere is called
Hygroscopic water
Capillary water
Gravitational water
Structural water
Which of the following factors is not responsible for the change in permeability of the soil
Viscosity of water
Shape and size ofpartic1es
Temperature
None of the above
On increasing compactive effort, the maximum dry density of the soil
decreases at slow rate
decreases at fast rate
increases
No change
At shrinkage limit the soil has the degree of saturation
zero percent
50%
75%
100%
Using phase relationship, show that
yd Gyw/1+e
A soil sample has bulk density 16·97 kN/m^3 and void ratio of 0·84. Determine the water content, dry density and degree of saturation of the sample, if the specific gravity of the soil particle is 2·70.
What is the difference between consolidation and compaction Discuss the factors affecting compaction.
The following are the results of Proctor's compaction test performed on a soil sample:
Water content Bulk density
12·0 16·0
14·0 17·0
17·0 18·0
19·5 17·8
20·5 16·5
Draw the compaction curve and find OMC and MDD.
For a stratified soil, how are the permeabilities determined in the direction of flow and perpendicular to the direction of flow? Write equations only.
A constant head permeability test was carried out on a cylindrical sample of sand of diameter 100 mm and height 150 mm. 160 cc water was collected in 105 sec. under a constant head of 300 mm. Determine the coefficient of permeability.
Explain the merits and demerits of direct shear test.
In an unconfined compression test on a soft clay, the following data was observed:
Length of the sample 75 mm
Initial area of the sample 1200 mm^2
Extension of spring at failure 25 mm
Spring constant 15 N/mm
Compression of sample at failure 18 mm
Determine the unconfined compressive strength of the soil sample using corrected area.
Explain the geophysical methods of soil exploration.
Write the equation for finding the bearing capacity of a shallow foundation given by Terzaghi. Mention the assumptions made.
Explain the circumstances under which a Strap footing and a Raft footing are provided.
A rectangular pile section, 0·6 m x 0·75 m and length 12 penetrates a deposit of clay with C =42 kN/m^2. Assuming m =0.75, find the magnitude of skin friction.
8. Write short notes on any two of the following:
Triaxial Shear Test
Classification of Soils
Permeability of Stratified Soil
The particle size distribution of soil is carried out by the following test
Core Cutter method
Sieve Analysis
Pycnometermethod
All of the above
Specific gravity of a soil sample is 2·60. If the void ratio of the soil is 0.30, the dry density of the soil will be
2·6 g/cc
1·3 g/cc
2 g/cc
1 g/cc
Shear strength of the soil depends upon
Cohesion
Angle of shearing resistance
Interlocking of particles
All of the above
The moisture absorbed by soil from atmosphere is called
Hygroscopic water
Capillary water
Gravitational water
Structural water
Which of the following factors is not responsible for the change in permeability of the soil
Viscosity of water
Shape and size ofpartic1es
Temperature
None of the above
On increasing compactive effort, the maximum dry density of the soil
decreases at slow rate
decreases at fast rate
increases
No change
At shrinkage limit the soil has the degree of saturation
zero percent
50%
75%
100%
Using phase relationship, show that
yd Gyw/1+e
A soil sample has bulk density 16·97 kN/m^3 and void ratio of 0·84. Determine the water content, dry density and degree of saturation of the sample, if the specific gravity of the soil particle is 2·70.
What is the difference between consolidation and compaction Discuss the factors affecting compaction.
The following are the results of Proctor's compaction test performed on a soil sample:
Water content Bulk density
12·0 16·0
14·0 17·0
17·0 18·0
19·5 17·8
20·5 16·5
Draw the compaction curve and find OMC and MDD.
For a stratified soil, how are the permeabilities determined in the direction of flow and perpendicular to the direction of flow? Write equations only.
A constant head permeability test was carried out on a cylindrical sample of sand of diameter 100 mm and height 150 mm. 160 cc water was collected in 105 sec. under a constant head of 300 mm. Determine the coefficient of permeability.
Explain the merits and demerits of direct shear test.
In an unconfined compression test on a soft clay, the following data was observed:
Length of the sample 75 mm
Initial area of the sample 1200 mm^2
Extension of spring at failure 25 mm
Spring constant 15 N/mm
Compression of sample at failure 18 mm
Determine the unconfined compressive strength of the soil sample using corrected area.
Explain the geophysical methods of soil exploration.
Write the equation for finding the bearing capacity of a shallow foundation given by Terzaghi. Mention the assumptions made.
Explain the circumstances under which a Strap footing and a Raft footing are provided.
A rectangular pile section, 0·6 m x 0·75 m and length 12 penetrates a deposit of clay with C =42 kN/m^2. Assuming m =0.75, find the magnitude of skin friction.
8. Write short notes on any two of the following:
Triaxial Shear Test
Classification of Soils
Permeability of Stratified Soil
Other Question Papers
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Subjects
- Construction Equipment
- Construction Management
- Construction Supervision and Building Maintenance
- Irrigation Engineering
- Prestressed Concrete
- Soil Mechanics and Foundation Engineering
- Technical Documentation
- Transportation Engineering