Virtual Labs

Determination of transmissivity of a highly permeable soil in an aquifer

Why is the soil sample compacted to a bulk density similar to that of site from which the sample is obtained from?

a: To match the moisture content Explanation

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b: To give an accurate representation of the site soil as bulk density affects permeability Explanation

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c: To not to change the void ratio from site Explanation

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d: None of the above Explanation

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What kinds of soils are suitable for Falling Head Permeability Test?

a: Fine-grained soil Explanation

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b: Coarse-grained soil Explanation

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c: Clay soil Explanation

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d: Saturated soil Explanation

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Why is a constant head maintained in constant head test?

a: To ensure same velocity of water through the soil with respect to time Explanation

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b: To ensure the manometer readings are same Explanation

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c: To ensure the soil doesn’t get washed off Explanation

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d: All of the above Explanation

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What is the standard temperature at which permeability is to be measured according to Indian Standards

a: 26 degree Celsius Explanation

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b: 27 degree Celsius Explanation

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c: 28 degree Celsius Explanation

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d: 30 degree Celsius Explanation

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What is the special property of the material used for filler disks

a: Low permeability Explanation

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b: High Permeability Explanation

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c: None of the above Explanation

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d: All of the above Explanation

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Darcy’s Law states that

a: Velocity is proportional to hydraulic gradient Explanation

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b: Discharge rate is proportion to head Explanation

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c: Velocity is inversely proportional to hydraulic gradient Explanation

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d: Discharge rate is inversely proportional to head Explanation

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Soils with hydraulic conductivity between 10^-5 and 10^-11 are known as

a: Permeable Soil Explanation

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b: Impermeable Soil Explanation

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c: Semi Permeable Soil Explanation

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d: None of the above Explanation

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What is the relation between the texture of the soil and the hydraulic conductivity?

a: Finer the soil higher the hydraulic conductivity Explanation

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b: Finer the soil lower the hydraulic conductivity Explanation

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c: None of the above Explanation

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d: All of the above Explanation

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Why is the water used for the test de-aired?

a: To remove impurities Explanation

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b: Maintain consistent density of water Explanation

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c: So that external particles don’t interfere in the test Explanation

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d: In order to make sure the flow is as steady as possible Explanation

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