ENR 3001 Final Exam Questions and Answers Latest Update 2025-2026
All native bedrock of Ohio is of? - AnswersSedimentary Origin
Sediment transported and deposited by glacial meltwater (glaciofluvial) is ? - Answersoutwash
In the wester half of Ohio, most soils are developed from some type of glacial deposit. - AnswersTrue
Residual and colluvial soils are very common in the unglaciated, northwestern portion of Ohio. -
AnswersFalse
In traveling from East to West Ohio bedrock exposures generally become younger in age. - AnswersFalse
Glacial outwash tends to be unstratified and poorly sorted. - AnswersFalse
Marble is created by metamorphic alteration of Limestone. - AnswersTrue
Most natural organic (peat) deposits in Ohio are found within the area once covered by glacial ice. -
AnswersTrue
Individual grains of intrusive (slowly cooled magma) igneous rocks cannot be seen without
magnification. - AnswersFalse
Slate is formed from metamorphic alteration of shale. - AnswersTrue
Soils with low clay content generally have low plasticity index. - AnswersTrue
A soil with COLE = 6% is l likely to be unsafe for building foundations. - AnswersFalse
Soils with high plasticity index can receive more water before reaching their liquid limit compared to
soils with low plasticity index. - AnswersTrue
Atterberg limits are water content at which soils undergo major changes of state (i.e. solid, semi-solid,
plastic, liquid). - AnswersTrue
Coefficient of Linear Extensibility (COLE) generally increases with decreasing clay content. -
AnswersFalse
The liquid limit is the clay content at which a soil becomes a fluid. - AnswersFalse
The lower plastic limit is the water content at which the soil passes from a plastic state to a semi-solid
state or solid state. - AnswersTrue
A soil with a liquid limit = 25% will become fluid when its clay content = 25%. - AnswersFalse
Atterberg limits generally decrease with decreasing clay content. - AnswersTrue
The plasticity index is the difference between the liquid limit (Upper Plastic Limit) and the lower plastic
limit. - AnswersTrue
, Ca2+ is a better dispersant of clay particles than Na+. - AnswersFalse
Al3+ is a better flocculant of clay [articles than Ca2+. - AnswersTrue
Particles of high densities have higher settling velocities (fall faster in a suspension) compared to
particles of low density. - AnswersTrue
Sand particles composed of quartz have higher settling velocities than silt particles also composed of
quartz. - AnswersTrue
The density of a settling suspension of soil particles gradually increases with time. - AnswersFalse
Soil particles > 2mm diameter are referred to as coarse fragments. - AnswersTrue
A 10-gram sample of mineral soil composed of 40% sand and 20% silt contains 4 grams of clay. -
AnswersTrue
Settling velocities of particles falling within a suspension decrease with increasing temperature of the
suspension. - AnswersFalse
Density of water increases with decreasing temperature. - AnswersTrue
A 2.57g sample of orthoclase, having a particle density = 2.57gcm-3 occupies a smaller volume
compared to a 5.14 gram sample of magnetite, having a particle density = 5.14 g cm-3. - AnswersFalse
"A" is the master horizon designation for a mineral soil surface horizon darkened by accumulation of
organic matter. - AnswersTrue
"t" is the subordinate horizon designation for the subsurface accumulation of illuviated (translocated)
clay, described as clay films, clay skins or argillans. - AnswersTrue
"g" is the subordinate horizon designation for dominance of gray (< or equal to 2 chroma) colors, usually
associated with poor drainage. - AnswersTrue
"medium" is a term used to describe structure type (shape). - AnswersFalse
"prismatic" is a component of Munsell color space. - AnswersFalse
The solum is the collection of soil horizons excluding the parent material. - AnswersTrue
Dominant subsoil with chromas > 2 are associated with poorly and very-poorly drained soils. -
AnswersFalse
"B" is the master horizon designation fro the subsoil horizon of alteration of accumulation of material
illuviated from overlying horizons. - AnswersTrue
Clods are the arrangement of soil particles into natural aggregates. - AnswersFalse
All native bedrock of Ohio is of? - AnswersSedimentary Origin
Sediment transported and deposited by glacial meltwater (glaciofluvial) is ? - Answersoutwash
In the wester half of Ohio, most soils are developed from some type of glacial deposit. - AnswersTrue
Residual and colluvial soils are very common in the unglaciated, northwestern portion of Ohio. -
AnswersFalse
In traveling from East to West Ohio bedrock exposures generally become younger in age. - AnswersFalse
Glacial outwash tends to be unstratified and poorly sorted. - AnswersFalse
Marble is created by metamorphic alteration of Limestone. - AnswersTrue
Most natural organic (peat) deposits in Ohio are found within the area once covered by glacial ice. -
AnswersTrue
Individual grains of intrusive (slowly cooled magma) igneous rocks cannot be seen without
magnification. - AnswersFalse
Slate is formed from metamorphic alteration of shale. - AnswersTrue
Soils with low clay content generally have low plasticity index. - AnswersTrue
A soil with COLE = 6% is l likely to be unsafe for building foundations. - AnswersFalse
Soils with high plasticity index can receive more water before reaching their liquid limit compared to
soils with low plasticity index. - AnswersTrue
Atterberg limits are water content at which soils undergo major changes of state (i.e. solid, semi-solid,
plastic, liquid). - AnswersTrue
Coefficient of Linear Extensibility (COLE) generally increases with decreasing clay content. -
AnswersFalse
The liquid limit is the clay content at which a soil becomes a fluid. - AnswersFalse
The lower plastic limit is the water content at which the soil passes from a plastic state to a semi-solid
state or solid state. - AnswersTrue
A soil with a liquid limit = 25% will become fluid when its clay content = 25%. - AnswersFalse
Atterberg limits generally decrease with decreasing clay content. - AnswersTrue
The plasticity index is the difference between the liquid limit (Upper Plastic Limit) and the lower plastic
limit. - AnswersTrue
, Ca2+ is a better dispersant of clay particles than Na+. - AnswersFalse
Al3+ is a better flocculant of clay [articles than Ca2+. - AnswersTrue
Particles of high densities have higher settling velocities (fall faster in a suspension) compared to
particles of low density. - AnswersTrue
Sand particles composed of quartz have higher settling velocities than silt particles also composed of
quartz. - AnswersTrue
The density of a settling suspension of soil particles gradually increases with time. - AnswersFalse
Soil particles > 2mm diameter are referred to as coarse fragments. - AnswersTrue
A 10-gram sample of mineral soil composed of 40% sand and 20% silt contains 4 grams of clay. -
AnswersTrue
Settling velocities of particles falling within a suspension decrease with increasing temperature of the
suspension. - AnswersFalse
Density of water increases with decreasing temperature. - AnswersTrue
A 2.57g sample of orthoclase, having a particle density = 2.57gcm-3 occupies a smaller volume
compared to a 5.14 gram sample of magnetite, having a particle density = 5.14 g cm-3. - AnswersFalse
"A" is the master horizon designation for a mineral soil surface horizon darkened by accumulation of
organic matter. - AnswersTrue
"t" is the subordinate horizon designation for the subsurface accumulation of illuviated (translocated)
clay, described as clay films, clay skins or argillans. - AnswersTrue
"g" is the subordinate horizon designation for dominance of gray (< or equal to 2 chroma) colors, usually
associated with poor drainage. - AnswersTrue
"medium" is a term used to describe structure type (shape). - AnswersFalse
"prismatic" is a component of Munsell color space. - AnswersFalse
The solum is the collection of soil horizons excluding the parent material. - AnswersTrue
Dominant subsoil with chromas > 2 are associated with poorly and very-poorly drained soils. -
AnswersFalse
"B" is the master horizon designation fro the subsoil horizon of alteration of accumulation of material
illuviated from overlying horizons. - AnswersTrue
Clods are the arrangement of soil particles into natural aggregates. - AnswersFalse
