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Geotechnical Materials and Properties

Description: This quiz covers fundamental concepts related to geotechnical materials and their properties, essential for understanding soil mechanics and foundation engineering.
Number of Questions: 15
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Tags: geotechnical engineering soil mechanics material properties
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Which of the following is NOT a primary soil constituent?

  1. Sand

  2. Silt

  3. Clay

  4. Organic Matter


Correct Option: D
Explanation:

Organic matter is not a primary soil constituent but can be present in varying amounts, influencing soil properties.

The size range of sand particles, according to the Unified Soil Classification System (USCS), is:

  1. 0.002 mm to 0.075 mm

  2. 0.075 mm to 4.75 mm

  3. 4.75 mm to 75 mm

  4. 75 mm to 300 mm


Correct Option: B
Explanation:

In the USCS, sand particles range from 0.075 mm to 4.75 mm in diameter.

The Atterberg Limits define the boundaries between different soil consistency states. Which of these limits represents the water content at which a soil changes from a plastic to a liquid state?

  1. Liquid Limit (LL)

  2. Plastic Limit (PL)

  3. Shrinkage Limit (SL)

  4. Optimum Moisture Content (OMC)


Correct Option: A
Explanation:

The Liquid Limit (LL) is the water content at which a soil changes from a plastic to a liquid state.

Which soil type is known for its high plasticity and cohesive properties?

  1. Sand

  2. Silt

  3. Clay

  4. Gravel


Correct Option: C
Explanation:

Clay is known for its high plasticity and cohesive properties due to the presence of clay minerals.

The angle of internal friction (φ) in soil mechanics represents:

  1. The angle at which a soil fails under shear stress

  2. The angle of repose of a soil

  3. The angle between the major and minor principal stresses

  4. The angle of settlement of a soil


Correct Option: A
Explanation:

The angle of internal friction (φ) is the angle at which a soil fails under shear stress.

The process of compacting soil to increase its density and reduce its void ratio is known as:

  1. Compaction

  2. Consolidation

  3. Settlement

  4. Shearing


Correct Option: A
Explanation:

Compaction is the process of compacting soil to increase its density and reduce its void ratio.

The maximum dry density (ρ_dmax) of a soil is the:

  1. Highest density achievable through compaction

  2. Density of soil at its natural state

  3. Density of soil at its saturated state

  4. Density of soil at its optimum moisture content


Correct Option: A
Explanation:

The maximum dry density (ρ_dmax) is the highest density achievable through compaction.

The permeability of a soil is a measure of its ability to:

  1. Allow water to flow through it

  2. Resist shear stress

  3. Withstand compression

  4. Retain moisture


Correct Option: A
Explanation:

Permeability is a measure of a soil's ability to allow water to flow through it.

The specific gravity (G_s) of a soil particle is defined as the ratio of its:

  1. Mass to its volume

  2. Mass to the mass of an equal volume of water

  3. Volume to its mass

  4. Volume to the volume of an equal mass of water


Correct Option: B
Explanation:

Specific gravity (G_s) is the ratio of the mass of a soil particle to the mass of an equal volume of water.

The void ratio (e) of a soil is the ratio of:

  1. Volume of voids to the volume of solids

  2. Volume of solids to the volume of voids

  3. Mass of solids to the mass of voids

  4. Mass of voids to the mass of solids


Correct Option: A
Explanation:

Void ratio (e) is the ratio of the volume of voids to the volume of solids.

The degree of saturation (S) of a soil is the ratio of:

  1. Volume of water to the volume of voids

  2. Volume of voids to the volume of water

  3. Mass of water to the mass of solids

  4. Mass of solids to the mass of water


Correct Option: A
Explanation:

Degree of saturation (S) is the ratio of the volume of water to the volume of voids.

The consolidation of soil involves:

  1. Reduction in soil volume due to applied stress

  2. Increase in soil volume due to applied stress

  3. Change in soil consistency due to applied stress

  4. Change in soil permeability due to applied stress


Correct Option: A
Explanation:

Consolidation involves the reduction in soil volume due to applied stress.

The coefficient of consolidation (c_v) is a measure of:

  1. Rate of consolidation of a soil

  2. Compressibility of a soil

  3. Permeability of a soil

  4. Shear strength of a soil


Correct Option: A
Explanation:

The coefficient of consolidation (c_v) is a measure of the rate of consolidation of a soil.

The preconsolidation pressure (p_c) of a soil is the:

  1. Maximum pressure the soil has experienced in its history

  2. Pressure at which the soil reaches its maximum dry density

  3. Pressure at which the soil fails under shear stress

  4. Pressure at which the soil reaches its liquid limit


Correct Option: A
Explanation:

The preconsolidation pressure (p_c) is the maximum pressure the soil has experienced in its history.

The bearing capacity of a soil is its ability to:

  1. Support a load without failure

  2. Allow water to flow through it

  3. Resist shear stress

  4. Consolidate under applied stress


Correct Option: A
Explanation:

Bearing capacity is the ability of a soil to support a load without failure.

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