Soil Mechanics Questions and Answers – Determination of Coefficient of Consolidation – 1

This set of Soil Mechanics Multiple Choice Questions & Answers (MCQs) focuses on “Determination of Coefficient of Consolidation – 1”.

1. The coefficient of consolidation can be determined by comparing characteristics of _______
a) time factor T_v and degree of consolidation U
b) degree of consolidation U and pore pressure u
c) pore pressure u and effective pressure σ’
d) effective pressure σ’ and total pressure σ
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2. The coefficient of consolidation can be found by _____________
a) square root of time fitting method only
b) logarithm of time fitting method only
c) both square root of time fitting and logarithm of time fitting method
d) no method is available
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3. The square root of time fitting method the theoretical graph is plotted between _____
a) \(\sqrt{T_v}\) is abscissa and U is ordinate
b) U is abscissa and \(\sqrt{T_v}\) is abscissa
c) Tv is abscissa and U is ordinate
d) \(\sqrt[3]{T_v}\) is abscissa and U is ordinate
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Answer: a
Explanation: The square root of time fitting method the theoretical graph is plotted between \(\sqrt{T_v}\) as abscissa and U as ordinate.

4. The curve is straight up to _______________
a) U = 60%
b) U = 65%
c) U = 70%
d) U = 55%
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Answer: a
Explanation: The square root of time fitting method the theoretical graph is plotted between \(\sqrt{T_v}\) as abscissa and U as ordinate and the curve is straight is up to U = 60%.

5. The abscissa at U=90% is roughly equal to ________ times the abscissa at U=60%.
a) 0
b) 1.10
c) 1.15
d) 1.00
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Answer: c
Explanation: The abscissa at U=90% is roughly equal to 1.15 times the abscissa at U=60%. It is represented in the diagram.
b/a=1.15.

6. The use of square root of fitting method was suggested by ________
a) Terzaghi
b) Taylor
c) Darcy
d) Skempton
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7. From the practical data, in square root of time fitting, ______ curve is plotted.
a) time t in abscissa and dial reading R in Ordinate
b) t² in abscissa and dial reading R in Ordinate
c) root of time √t in abscissa and dial reading R in Ordinate
d) t³ in abscissa and dial reading R in Ordinate
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8. In the graph, point R_c represents ________

a) initial consolidation
b) corrected zero reading
c) secondary consolidation
d) initial zero reading
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9. The consolidation between R_o and R_c is called ______________
a) initial consolidation
b) corrected zero reading
c) secondary consolidation
d) initial zero reading
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10. The coefficient of consolidation from square root of time fitting method is calculated from the equation _________
a) \(c_v=\frac{(T_v)_{90} d^2}{t_{90}} \)
b) \(c_v=\frac{(t_{90})_{90} d^2}{T_{90}} \)
c) \(c_v=\frac{(T_v)_{90} d}{T_{90}} \)
d) \(c_v=\frac{(T_v)_{90} d^3}{t_{90}} \)
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Sanfoundry Global Education & Learning Series – Soil Mechanics.

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