SB102 Final Exam Questions and Correct
Answers
Question 1
Which of the following is NOT a reason for sampling embankment soil and non-select
backfill?
A. To obtain a representative sample from undisturbed or disturbed material.
B. To determine the temperature of the soil.
Correct Answer
Answer: B. To determine the temperature of the soil.
Question 2
For soils with moderate to high Plasticity Indices (PI), what is the recommended
minimum soaking time?
a. 2 hours
b. 4 hours
c. 6 hours
d. 12 hours
Correct Answer
d. 12 hours
Question 3
For the Phenolphthalein Indicator, in which solvent is the phenolphthalein first
dissolved?
a) Ethyl alcohol
b) Deionized water
Correct Answer
a) Ethyl alcohol
Page 1 of 30
,Question 4
Which of the following tests is used to determine the plasticity index?
A. Tex-106-E
B. Tex-110-E
Correct Answer
A. Tex-106-E
Question 5
What is the desired normality (N) for the hydrochloric acid solution in the test?
a) 0.9908 N
d) 1.0000 N
Correct Answer
d) 1.0000 N
Question 6
Which equipment is recommended for sampling materials that are shallow and easily
dug?
1. Power drill rig
2. Large excavation machines
3. Small hand tools
Correct Answer
3. Small hand tools
Question 7
For what purpose can a 1% phenolphthalein indicator solution be applied?
A. To emphasize the bottom of a layer if lime or cement is used in neutral or acid soils.
B. To stabilize the soil.
C. To cleanse the apparatus.
Correct Answer
A. To emphasize the bottom of a layer if lime or cement is used in neutral or acid
soils.
Page 2 of 30
, Question 8
Which of the following materials does the Tex-103-E method NOT provide true
representative results for?
A. Sandy soils
B. Materials containing holloysite
C. Gravel
Correct Answer
B. Materials containing holloysite
Question 9
Which of the following is NOT part of the apparatus required for this test?
A. Depth measurement indicator.
B. Drill with auger bit.
C. Electronic scale.
Correct Answer
C. Electronic scale.
Question 10
When preparing samples for compaction and triaxial tests, what approximate weight
of a representative sample should be selected?
a. 36 kg (80 lb.)
b. 60 kg (132 lb.)
c. 90 kg (200 lb.)
Correct Answer
c. 90 kg (200 lb.)
Page 3 of 30
Answers
Question 1
Which of the following is NOT a reason for sampling embankment soil and non-select
backfill?
A. To obtain a representative sample from undisturbed or disturbed material.
B. To determine the temperature of the soil.
Correct Answer
Answer: B. To determine the temperature of the soil.
Question 2
For soils with moderate to high Plasticity Indices (PI), what is the recommended
minimum soaking time?
a. 2 hours
b. 4 hours
c. 6 hours
d. 12 hours
Correct Answer
d. 12 hours
Question 3
For the Phenolphthalein Indicator, in which solvent is the phenolphthalein first
dissolved?
a) Ethyl alcohol
b) Deionized water
Correct Answer
a) Ethyl alcohol
Page 1 of 30
,Question 4
Which of the following tests is used to determine the plasticity index?
A. Tex-106-E
B. Tex-110-E
Correct Answer
A. Tex-106-E
Question 5
What is the desired normality (N) for the hydrochloric acid solution in the test?
a) 0.9908 N
d) 1.0000 N
Correct Answer
d) 1.0000 N
Question 6
Which equipment is recommended for sampling materials that are shallow and easily
dug?
1. Power drill rig
2. Large excavation machines
3. Small hand tools
Correct Answer
3. Small hand tools
Question 7
For what purpose can a 1% phenolphthalein indicator solution be applied?
A. To emphasize the bottom of a layer if lime or cement is used in neutral or acid soils.
B. To stabilize the soil.
C. To cleanse the apparatus.
Correct Answer
A. To emphasize the bottom of a layer if lime or cement is used in neutral or acid
soils.
Page 2 of 30
, Question 8
Which of the following materials does the Tex-103-E method NOT provide true
representative results for?
A. Sandy soils
B. Materials containing holloysite
C. Gravel
Correct Answer
B. Materials containing holloysite
Question 9
Which of the following is NOT part of the apparatus required for this test?
A. Depth measurement indicator.
B. Drill with auger bit.
C. Electronic scale.
Correct Answer
C. Electronic scale.
Question 10
When preparing samples for compaction and triaxial tests, what approximate weight
of a representative sample should be selected?
a. 36 kg (80 lb.)
b. 60 kg (132 lb.)
c. 90 kg (200 lb.)
Correct Answer
c. 90 kg (200 lb.)
Page 3 of 30
