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Rock Mass Analysis and Foundation Design

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Questions and Answers

What is the primary reason for determining the specific gravity of soil solids with great precision?

To estimate the quantity of soil required for placing and compacting a certain fill or embankment (correct)
To determine the relative compactness of the soil mass
To determine the particle-size distribution of the soil
To understand the influence of color on soil properties

What does the color of a soil provide clues about?

The in-situ unit weight of the soil
The particle-size distribution of the soil
The relative density of the soil
Other soil properties and conditions (correct)

What is the main purpose of determining the in-situ unit weight of a soil?

To estimate the quantity of soil required for placing and compacting a certain fill or embankment (correct)
To understand the influence of color on soil properties
To determine the particle-size distribution of the soil
To determine the relative compactness of the soil mass

What are the two important methods for determining the in-situ unit weight of a soil?

Sand-replacement method and Core-cutter method (A) Signup and view all the answers

What is the primary purpose of determining the relative density of a soil?

To determine the relative compactness of the soil mass (B) Signup and view all the answers

What is the main purpose of determining the particle-size distribution of a soil?

To determine the range of sizes of particles in the soil (B) Signup and view all the answers

What is the effect of coarse-grained soils or sand on soil colors?

It is one of the factors that influence soil colors (C) Signup and view all the answers

What is the relationship between the void ratio and the density of a soil?

In a dense condition, the void ratio is high whereas in a loose condition, the void ratio is low (B) Signup and view all the answers

What is the purpose of making in-situ determination of a unit weight of the soil during the construction of compacted fills?

To ensure that the compaction effort has been adequate (C) Signup and view all the answers

What is the primary purpose of determining the index properties of a soil?

To determine the engineering behavior of the soil (A) Signup and view all the answers

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