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ENR3001 Exam With Verified Solution
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ENR3001 Exam With VerifiedSolution
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
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
Adsorbed water - Answer expresses restricted molecular motions (stretching, rotating,
vibrating)
Soil texture class that has the lowest permanent wilting point - Answer sand
Soil texture class that has the highest bulk density - Answer sandy loam
Soil texture class containing the most gravitational water - Answer NOT clay loam
Soil texture class that has the fastest rate of capillary rise - Answer NOT silt loam
A soil holds 10 gallons of water at field capacity and retains 2 gallons of water at the
wilting point. The available water of this soil is - Answer 8 gallons
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