CMP 305 Test Questions with All Correct Answers
Montmorillonite is known to have what properties? - Answer-high volume changes and weak bonds
phase diagram displays what? - Answer-relationship between volume and weight of a soil bunk
does clay absorb more or less water than other types of...
Montmorillonite is known to have what properties? - Answer-high volume changes and
weak bonds
phase diagram displays what? - Answer-relationship between volume and weight of a
soil bunk
does clay absorb more or less water than other types of soils - Answer-more, clay
attracts water
when is angular-granular soil at its highest shear strength? - Answer-when it is in a
dense condition and has a low void ratio
of the four soil groups which has the greatest expansive characteristics with water? -
Answer-clay
load-ability - Answer-measure of difficulty in excavating and loading a soil
what kind of soil has high load-ability - Answer-loose, granular soil
what kind of soil has low load-ability? - Answer-compacted (frost), clay, rock
classification for a fine grained soil being a clay or silt is based on what? - Answer-
plasticity, not particle size
soil with best engineering properties? - Answer-angular, high shear strength, good
distribution of particle sizes so they can be packed together
well graded soil - Answer-Soil with a variety of particle sizes that tend to form a denser
structure
poor graded soil - Answer-uniform particle sizes, can't be packed into eachother
the smaller the void ratio (denser the material) - Answer-the greater the compressive
strength of the soil resulting in low compressibility of soil
, spoil - Answer-removed soil
coarse soil in loose condition (like after initial placement) is more likely to have what if
subject to vibration? - Answer-quick volume reductions and loss of strength
gap graded soil - Answer-lots of large size particles and lots of small size particles, no
inbetween
is it better to have soil that is layered or mixed together? - Answer-layered
coarse grained soil - Answer-non-cohesive, sand and gravel
fine grained soil - Answer-cohesive, clay and silt
2 lab tests for engineering properties of soil - Answer-sieve and sedimentation
will coarse grained soils pass the 200 sieve? - Answer-no
more than 50% by weight that passes 200 sieve? - Answer-fine grained soil
anything that does not pass the 200 sieve with 50% by weight? - Answer-coarse
grained soil
what would pea stone be classified as? - Answer-poorly, uniform, graded soil
liquid limit? - Answer-expressed in % of dry weight, point at which soil will begin to flow,
uses standard shake test
plastic limit? - Answer-moisture content in % at which the soil begins to crumble when
rolled into a 1/8th inch diameter ball
bank - Answer-material in its natural state, referred to as "in place", unit" BCY bank
cubic yards
unit soil weight depends on - Answer-soil type, soil moisture, soil compaction, density
loose - Answer-material that has been excavated, unit: LCY loose cubic yard
compacted - Answer-material after compaction, unit: CCY
swell - Answer-soil volume increase, after excavation, unit volume is greater due to
new/more air voids
shrinkage - Answer-compacted soil, decrease in void space, less volume
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