Use the following as many times as you need for choosing the most suitable match
ID: 285238 • Letter: U
Question
Use the following as many times as you need for choosing the most suitable match for (a) to (p) given below, and write that word/phrase in the blank space. : ________ needs True or False response.
(based on your reading of sections 2.1 to 2.10, 12.14, and class notes)
True Glaciers L-wave R
Homogenous Volcanic ash False Backswamp deposits
Silica Quartz S-wave Relative density
Silts Clays P-wave Heterogeneous
Wind Kaolinite Residual soils Organic soils Loess Lakes Gravels Illite
a) The chemical composition of calcium feldspar is SiO2: ___________.
b)Chemical weathering of orthoclase results in formation of a clay mineral called ______________________.
c) _______________________________ are formed by the weathered products at their place of origin.
d) The soil deposits formed by mud flows are highly __________________________ in composition.
e) _____________ form braided-deposits in which “unit weight” varies over a wide range over short distances.
f) ______________________________in floodplains of rivers contain finer silts, and often highly plastic clays.
g) Ground moraines that constitute large areas of central United States were formed by ______________.
h) In aeolian deposits, the _______________________ is significantly smaller on the leeward side of the dune.
i) Loess is an example of soils transported and deposited by the ______________.
j) Decomposition of _______________________________ results in highly plastic and compressible clays.
k) __________________________ are formed by decomposition of aquatic plants.
(They also have very high moisture content, and they are highly compressible.)
l) Organic soils are highly compressible that could cause foundations to settle excessively: __________.
m) The average typical P-wave velocity of _______________ is about 500 m/s.
n) Cross-hole seismic survey is based on the measurement of ________________ velocity.
o) Just two electrodes shall be driven into ground for doing electrical resistivity survey: ___________.
p) The average typical electrical resistivity of ___________________________is about 50 ohm.m.
Explanation / Answer
a) The chemical composition of calcium feldspar is SiO2: False.
The chemical composition of calcium feldspar is CaAl2Si2O8.
b) Chemical weathering of orthoclase results in formation of a clay mineral called Kaolinite.
c) Residual soils are formed by the weathered products at their place of origin.
d) The soil deposits formed by mudflows are highly Heterogeneous in composition.
e) River form braided-deposits in which “unit weight” varies over a wide range over short distances.
f) Backswamp deposits in floodplains of rivers contain finer silts, and often highly plastic clays.
g) Ground moraines that constitute large areas of central United States were formed by Glaciers.
h) In aeolian deposits, the Loess is significantly smaller on the leeward side of the dune.
i) Loess is an example of soils transported and deposited by the Wind.
j) Decomposition of Organic soils results in highly plastic and compressible clays.
k) Organic soils are formed by decomposition of aquatic plants.
(They also have very high moisture content, and they are highly compressible.)
l) Organic soils are highly compressible that could cause foundations to settle excessively: True.
Foundations on bedrock settle a negligible amount. Foundations in other types of soil may settle much more. Foundations in clay settle more. As Organic soils are highly compressible that could cause foundations to settle excessively.
m) The average typical P-wave velocity of silica is about 500 m/s.
n) Cross-hole seismic survey is based on the measurement of S-wave velocity.
o) Just two electrodes shall be driven into ground for doing electrical resistivity survey: True.
p) The average typical electrical resistivity of Volcanic ash is about 50 ohm.m.
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