CEEN 442 Foundations - Exam 1 |\ |\ |\ |\ |\ |\
questions with answers |\ |\
S=1 and wPL < wN < wLL indicates - CORRECT ANSWERS
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✔✔over-consolidated soil
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S=1 and wLL ≈ wN indicates - CORRECT ANSWERS
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✔✔normally consolidated soil |\ |\
S=1 and wN > wLL indicates - CORRECT ANSWERS
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✔✔sensitive soil |\
PI > 20 indicates - CORRECT ANSWERS ✔✔expansive soil
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What is a "floating mat foundation"? - CORRECT
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ANSWERS ✔✔excavation to compensate for pressure due |\ |\ |\ |\ |\ |\ |\
to weight of structure
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Why should compacted fill below a footing be at least two
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\
times as wide as the footing? - CORRECT ANSWERS
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✔✔b/c the stresses go beyond the range of the footing
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Compacted fill for structural foundations densified to 95% |\ |\ |\ |\ |\ |\ |\
of the modified proctor maximum density can typically be
|\ |\ |\ |\ |\ |\ |\ |\ |\
, assumed to have a relative density of ___________. -
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CORRECT ANSWERS ✔✔60% - 70% |\ |\ |\ |\
In order for a sample to be considered "undisturbed" the
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area ratio of the sampler must be less than ____________. -
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CORRECT ANSWERS ✔✔10%
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What is the standard penetration resistance or N value? -
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CORRECT ANSWERS ✔✔The number of blows to drive a |\ |\ |\ |\ |\ |\ |\ |\ |\
standard sampler through 12in of penetration with 140lb
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weight and drop height of 30in. |\ |\ |\ |\ |\
List two important parameters that can be obtained using
|\ |\ |\ |\ |\ |\ |\ |\
the N value. - CORRECT ANSWERS ✔✔relative density
|\ |\ |\ |\ |\ |\ |\ |\ |\
(Dr)
dry unit weight (γ)
|\ |\ |\
friction angle () |\ |\
When sampling in sand one should use a ________ while
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\
sampling in clay one should use a ______. - CORRECT |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
ANSWERS ✔✔split-spoon |\
shelby tube |\
questions with answers |\ |\
S=1 and wPL < wN < wLL indicates - CORRECT ANSWERS
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\
✔✔over-consolidated soil
|\ |\
S=1 and wLL ≈ wN indicates - CORRECT ANSWERS
|\ |\ |\ |\ |\ |\ |\ |\ |\
✔✔normally consolidated soil |\ |\
S=1 and wN > wLL indicates - CORRECT ANSWERS
|\ |\ |\ |\ |\ |\ |\ |\ |\
✔✔sensitive soil |\
PI > 20 indicates - CORRECT ANSWERS ✔✔expansive soil
|\ |\ |\ |\ |\ |\ |\ |\
What is a "floating mat foundation"? - CORRECT
|\ |\ |\ |\ |\ |\ |\ |\
ANSWERS ✔✔excavation to compensate for pressure due |\ |\ |\ |\ |\ |\ |\
to weight of structure
|\ |\ |\
Why should compacted fill below a footing be at least two
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\
times as wide as the footing? - CORRECT ANSWERS
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\
✔✔b/c the stresses go beyond the range of the footing
|\ |\ |\ |\ |\ |\ |\ |\ |\
Compacted fill for structural foundations densified to 95% |\ |\ |\ |\ |\ |\ |\
of the modified proctor maximum density can typically be
|\ |\ |\ |\ |\ |\ |\ |\ |\
, assumed to have a relative density of ___________. -
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\
CORRECT ANSWERS ✔✔60% - 70% |\ |\ |\ |\
In order for a sample to be considered "undisturbed" the
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\
area ratio of the sampler must be less than ____________. -
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\
CORRECT ANSWERS ✔✔10%
|\ |\ |\
What is the standard penetration resistance or N value? -
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\
CORRECT ANSWERS ✔✔The number of blows to drive a |\ |\ |\ |\ |\ |\ |\ |\ |\
standard sampler through 12in of penetration with 140lb
|\ |\ |\ |\ |\ |\ |\ |\
weight and drop height of 30in. |\ |\ |\ |\ |\
List two important parameters that can be obtained using
|\ |\ |\ |\ |\ |\ |\ |\
the N value. - CORRECT ANSWERS ✔✔relative density
|\ |\ |\ |\ |\ |\ |\ |\ |\
(Dr)
dry unit weight (γ)
|\ |\ |\
friction angle () |\ |\
When sampling in sand one should use a ________ while
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\
sampling in clay one should use a ______. - CORRECT |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
ANSWERS ✔✔split-spoon |\
shelby tube |\
