CE 360 FINAL PRACTICE EXAM | QUESTIONS AND
ANSWERS | 100% CORRECT
A colluvial soil is a soil which was formed by: Answer - deposition of soil
particles at the base of a slope by gravity
For the particle size distribution shown above which of the soils is the best
example of a well-graded soil? Answer - Soil C
For the particle size distribution shown above, which soil is most likely to
represent a silty sand (SM) according to the USCS? Answer - Soil A
A sample of clay soil for testing in the triaxial compression test can best be
sampled with a: Answer - Shelby tube sampler
Given a soil that has a moist unit weight of 122.8 pcf, wc is 26.4 %, and Gs =
2.71. The dry unit weight for the soil is most closely represented by: Answer -
97 lb/ft3
A moist soil sample weighing 5 lb has a moisture content of 2%. How many mL
of water must be added to the sample to increase the moisture content to
10%? Answer - 0.39 lb of water
A compacted fill, currently under construction, will support a proposed
supermarket. One of the field density tests in this fill gave a total unit weight of
, 121 lb/ft3 and a moisture content of 12.5%. A series of modified Proctor tests
have also on been performed on the fill soil per ASTM D1557, Answer -
103%>90% Do not meet the specs
What type of field compactor provides the best results in compacting sands
Answer - a vibratory roller
Consider the permeameter shown below with the following data:
Sample dia = 7.6 cm
Sample length = 15.2 cm
h = 38.5 cm
Q = 93 kg of water
t = 38 minutes
Determine: k in cm/sec Answer - 3.5 x 10-1 cm/sec
A section through a dam is shown below. The coefficient of permeability of the
foundation soil is k=80 ft/yr. The quantity of seepage, q, under the dam is most
closely represented by (Note: γw=62.4 lb/ft3): Answer - 2.8 ft3/day (per ft)
For the section through a dam shown above, the pore water pressure at point
A is: Answer - 1,952 lb/ft2
With reference to the soil profile above, the total stress at point A is most
closely represented by: Answer - 3452 lb/ft2
With reference to the soil profile above, the effective stress at point B is most
closely represented by: Answer - 1020 lb/ft2
ANSWERS | 100% CORRECT
A colluvial soil is a soil which was formed by: Answer - deposition of soil
particles at the base of a slope by gravity
For the particle size distribution shown above which of the soils is the best
example of a well-graded soil? Answer - Soil C
For the particle size distribution shown above, which soil is most likely to
represent a silty sand (SM) according to the USCS? Answer - Soil A
A sample of clay soil for testing in the triaxial compression test can best be
sampled with a: Answer - Shelby tube sampler
Given a soil that has a moist unit weight of 122.8 pcf, wc is 26.4 %, and Gs =
2.71. The dry unit weight for the soil is most closely represented by: Answer -
97 lb/ft3
A moist soil sample weighing 5 lb has a moisture content of 2%. How many mL
of water must be added to the sample to increase the moisture content to
10%? Answer - 0.39 lb of water
A compacted fill, currently under construction, will support a proposed
supermarket. One of the field density tests in this fill gave a total unit weight of
, 121 lb/ft3 and a moisture content of 12.5%. A series of modified Proctor tests
have also on been performed on the fill soil per ASTM D1557, Answer -
103%>90% Do not meet the specs
What type of field compactor provides the best results in compacting sands
Answer - a vibratory roller
Consider the permeameter shown below with the following data:
Sample dia = 7.6 cm
Sample length = 15.2 cm
h = 38.5 cm
Q = 93 kg of water
t = 38 minutes
Determine: k in cm/sec Answer - 3.5 x 10-1 cm/sec
A section through a dam is shown below. The coefficient of permeability of the
foundation soil is k=80 ft/yr. The quantity of seepage, q, under the dam is most
closely represented by (Note: γw=62.4 lb/ft3): Answer - 2.8 ft3/day (per ft)
For the section through a dam shown above, the pore water pressure at point
A is: Answer - 1,952 lb/ft2
With reference to the soil profile above, the total stress at point A is most
closely represented by: Answer - 3452 lb/ft2
With reference to the soil profile above, the effective stress at point B is most
closely represented by: Answer - 1020 lb/ft2
