©BRIGHTSTARS EXAM SOLUTIONS
11/16/2024 10:16 AM
ENR3001 Exam Questions With Correct
Answers
Dark colored igneous rocks are enriched in silicon (Si), aluminum (Al), potassium (K) and sodium
(Na). and deficient in iron (Fe), calcium (Ca) and magnesium (Mg). - answer✔False
Sediment transported and deposited by glacial meltwater (glaciofluvial) is - answer✔outwash
In travelling from west to east, Ohio bedrock exposures generally become younger in age. -
answer✔True
All outcropping native bedrock in Ohio was formed during - answer✔the Paleozoic era
Most natural organic (peat) deposits in Ohio are found within the area once covered by glacial
ice. - answer✔True
Slate is created by metamorphic alteration of - answer✔shale
Glacial landform composed of a thin veneer of glacial till deposited by melting ice during glacial
retreat. - answer✔ground moraine
In the western half of Ohio, most soils are developed from some type of glacial deposit. -
answer✔True
Glacial outwash tends to be unstratified and poorly sorted. - answer✔False
Individual grains of intrusive (slowly cooled magma) igneous rocks cannot be seen without
magnification. - answer✔False
Identify the location of the cross-hatched area shown below. - answer✔T.1S R.1W Sec 10
In the topographic image below, the horizontal distance from the hilltop to the valley floor is
2192 ft. Find the percent slope and the elevation. - answer✔14, 20
In the topographic image below, the horizontal distance from the hilltop to the and elevation
contour interval. - answer✔5.4, 10
1|Page
, ©BRIGHTSTARS EXAM SOLUTIONS
11/16/2024 10:16 AM
The density of a settling suspension of soil particles gradually increases with time. -
answer✔False
Remains a ball when squeezed, 1-2 inch long ribbons and excessively smooth feel is - answer✔a
silty clay loam texture
The buoyant force on a floating hydrometer is equal to the weight of the suspension displaced
by the hydrometer. - answer✔True
Particles of high density have higher settling velocities (fall faster in a suspension) compared to
particles of low density. - answer✔True
Remains a ball when squeezed, <1-inch long ribbons and neither excessively smooth nor
excessively gritty feel is - answer✔a loam texture
A 10-gram sample of mineral soil composed of 40% sand and 20% silt contains 4 grams of clay. -
answer✔True
Remains a ball when squeezed but does not ribbon is - answer✔a loamy sand texture
In a suspension of settling particles, the particle settling velocity decreases with - answer✔none
of the choices given??
Ca2+ is a better dispersant of clay particles than Na+. - answer✔False
Dry sandy soils evolve more heat of wetting compared to dry clayey soils - answer✔False
Attraction among water molecules for each other - answer✔cohesion
Atterberg limits are water contents at which soils undergo major changes of state (i.e. solid,
semi-solid, plastic, liquid). - answer✔True
A soil with LEP >9 is likely to be unsafe for building foundations. - answer✔True
Atterberg limits generally decrease with decreasing clay content. - answer✔True
Clayey soils can receive less water before reaching their liquid limit compared to sandy soils -
answer✔False
Atterberg limits are water contents at which soils undergo changes in behavior - answer✔True
A model for the structure of silicate clay minerals that best fits the results of clay surface area
measurements is - answer✔the layer model
Soils with low clay content generally have low plasticity index. - answer✔True
2|Page
11/16/2024 10:16 AM
ENR3001 Exam Questions With Correct
Answers
Dark colored igneous rocks are enriched in silicon (Si), aluminum (Al), potassium (K) and sodium
(Na). and deficient in iron (Fe), calcium (Ca) and magnesium (Mg). - answer✔False
Sediment transported and deposited by glacial meltwater (glaciofluvial) is - answer✔outwash
In travelling from west to east, Ohio bedrock exposures generally become younger in age. -
answer✔True
All outcropping native bedrock in Ohio was formed during - answer✔the Paleozoic era
Most natural organic (peat) deposits in Ohio are found within the area once covered by glacial
ice. - answer✔True
Slate is created by metamorphic alteration of - answer✔shale
Glacial landform composed of a thin veneer of glacial till deposited by melting ice during glacial
retreat. - answer✔ground moraine
In the western half of Ohio, most soils are developed from some type of glacial deposit. -
answer✔True
Glacial outwash tends to be unstratified and poorly sorted. - answer✔False
Individual grains of intrusive (slowly cooled magma) igneous rocks cannot be seen without
magnification. - answer✔False
Identify the location of the cross-hatched area shown below. - answer✔T.1S R.1W Sec 10
In the topographic image below, the horizontal distance from the hilltop to the valley floor is
2192 ft. Find the percent slope and the elevation. - answer✔14, 20
In the topographic image below, the horizontal distance from the hilltop to the and elevation
contour interval. - answer✔5.4, 10
1|Page
, ©BRIGHTSTARS EXAM SOLUTIONS
11/16/2024 10:16 AM
The density of a settling suspension of soil particles gradually increases with time. -
answer✔False
Remains a ball when squeezed, 1-2 inch long ribbons and excessively smooth feel is - answer✔a
silty clay loam texture
The buoyant force on a floating hydrometer is equal to the weight of the suspension displaced
by the hydrometer. - answer✔True
Particles of high density have higher settling velocities (fall faster in a suspension) compared to
particles of low density. - answer✔True
Remains a ball when squeezed, <1-inch long ribbons and neither excessively smooth nor
excessively gritty feel is - answer✔a loam texture
A 10-gram sample of mineral soil composed of 40% sand and 20% silt contains 4 grams of clay. -
answer✔True
Remains a ball when squeezed but does not ribbon is - answer✔a loamy sand texture
In a suspension of settling particles, the particle settling velocity decreases with - answer✔none
of the choices given??
Ca2+ is a better dispersant of clay particles than Na+. - answer✔False
Dry sandy soils evolve more heat of wetting compared to dry clayey soils - answer✔False
Attraction among water molecules for each other - answer✔cohesion
Atterberg limits are water contents at which soils undergo major changes of state (i.e. solid,
semi-solid, plastic, liquid). - answer✔True
A soil with LEP >9 is likely to be unsafe for building foundations. - answer✔True
Atterberg limits generally decrease with decreasing clay content. - answer✔True
Clayey soils can receive less water before reaching their liquid limit compared to sandy soils -
answer✔False
Atterberg limits are water contents at which soils undergo changes in behavior - answer✔True
A model for the structure of silicate clay minerals that best fits the results of clay surface area
measurements is - answer✔the layer model
Soils with low clay content generally have low plasticity index. - answer✔True
2|Page
