Geotechnical Engineering 1 (prelim exam)
Name:__________________________________________________________ YR./SEC:________________
TEST I (Solving Problem)
1. In a soil sample has a dry unit weight of 18.30 KN/m 3, moisture content o 12% and a specific gravity of solid particles is
2.62. Calculate the following:
a. void ratio
b. Moisture and Saturated unit weight
c. The mass of water to be added to cubic meter of soil to reach 80% saturation
d. The volume of solid particles when the mass of water is 25 grams for saturation.
2. The total volume of a soil specimen is 80,000 mm 3 and it weighs 150 grams. The dry weight of the specimen is 130
grams and the density of the soil solids is 2680 Kg/m 3. Find the following
a. water content
b. void ratio
c. porosity
d. degree of saturation
e. saturated unit weight
3. Soil has been compacted in an embankment at a bulk unit weight of 21 KN/m 3 and water content of 12%, the solid
particle of soil having specific gravity of 2.60. Calculate percentage of air content of soil specimen.
4. An oven dried soil having weight of 200g. is place in pycnometer which is then completely filled with water. The total
weight of the pycnometer with water and soil inside is 1605 g. The pycnometer filled with water alone has a weight of
1480g. Calculate the specific gravity of soil
TEST II (Discuss the following)
5. Formation of Soil and Soil Deposits
6. Origin of soils and rocks.
7. Soil identification and classification.
TEST III. (ESSAY)
8. What is the importance of soil mechanics in civil engineering field?
Geotechnical Engineering 1 (prelim exam) SET B
Name:__________________________________________________________ YR./SEC:________________
1. In a soil sample has a dry unit weight of 18.65 KN/m 3, moisture content of 10% and a specific gravity of solid particles
is 2.65. Calculate the following:
a. void ratio
b. Moisture and Saturated unit weight
c. The mass of water to be added to cubic meter of soil to reach 80% saturation
d. The volume of solid particles when the mass of water is 25 grams for saturation.
2. A sample of saturated clay was placed in a container and weighed. The weight was 6N. The clay was placed in an oven
for 24 hours @ 1050 C. The weight reduced to a constant weight of 5N. The weight of the container is 1N. If G s=2.7,
determine:
a. water content
b. void ratio
c. moist unit weight
d. dry unit weight
e. effective unit weight (submerge unit weight)
3. Soil has been compacted in an embankment at a bulk unit weight of 20.5 KN/m 3 and water content of 12%, the solid
particle of soil having specific gravity of 2.60. Calculate percentage of air content of soil specimen.
4. An oven dried soil having weight of 200g. is place in pycnometer which is then completely filled with water. The total
weight of the pycnometer with water and soil inside is 1605 g. The pycnometer filled with water alone has a weight of
1480g. Calculate the specific gravity of soil
TEST II
In one sentence define the following:
1.Degree of Saturation
2. Porosity
3. Void ratio
4. Specific gravity
5. Moisture content
