3-12.
Which of the following requirements
is true of a test pit excavation?
1.
Must be large enough for a man
to enter
2.
Must be made with power-driven
equipment
3.
Must be below the water table
4.
Load-bearing tests must be
performed on soil samples taken
every 18 inches
3-13.
Test holes are best performed on
what type of soil?
1.
Cohesiveless soil below the
water table
2.
Cohesiveless soil above the
water table with large
aggregate
3.
Cohesive soil
4.
Bedrock
3-14.
Soil samples obtained by digging
test holes are used for which of
the following test purposes?
1.
Soil classification
2.
Compaction
3.
Moisture Content
4.
Each of the above
3-15.
What method is commonly used
commercially to make deep test
holes?
1.
Wash boring
2.
Core boring
3.
Drilling
4.
Auger boring
3-16.
Undisturbed samples are used to
test which of the following
qualities of the soil?
1.
Saturation point
2.
Cohesiveness
3.
Shear strength
4.
Load-bearing strength
3-17.
You must determine subgrade
conditions for construction of a
new road. What is the next step
once the field reconnaissance has
been completed?
1.
Develop soil profiles
2.
Classify the soil
3.
Obtain samples for laboratory
testing
4.
Perform preliminary borings at
appropriate locations
3-18.
When performing soils investigation
on possible borrow areas, you
should make borings to what depth?
1.
10 feet
2.
The depth of planned excavation
3.
2 - 4 feet below anticipated
excavation
4.
Same depth as all other borings
3-19.
When performing soils surveys,
which of the following sources
should you use to obtain
information pertinent to the area?
1.
Local contractors
2.
Existing mine shafts of earth
cellars
3.
Eroded slopes
4.
All of the above
3-20.
Detailed soil explorations should
be performed at what type of site?
1.
Proposed center line
2.
Proposed large cut location
3.
Extreme grade shift
4.
Proposed pavement location
3-21.
What minimum spacing, if any, is
required between boring holes?
1.
25 feet
2.
50 feet
3.
100 feet
4.
None
Learning Objective: Identify the
classification of soils according
to the Unified Soil Classification
System and solve mathematical
problems related to soil
classification.
3-22.
Highly organic soil is identified
by what manner?
1.
More than 50 percent passing a
No. 200 sieve
2.
50 percent or more retained on
a No. 200 sieve
3.
Determining that the sample is
neither a fine-grained nor
coarse-grained soil
4.
Visual inspection
3-23.
The Unified Soil Classification
System uses what number of groups
for soil classification?
1.
Five
2.
Seven
3.
Fifteen
4.
Thirty
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