GATE CE 2024 Set 1 — Question 19
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Geotechnical Engineering → Soil Phase & Index Properties → Index Properties
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Question
Consider the statements P and Q.P: Soil particles formed by mechanical weathering, and close to their origin are generally subrounded.Q: Activity of the clay physically signifies its swell potential.Which one of the following options is CORRECT?
Correct answer
(D) P is FALSE and Q is TRUE
Solution
Statement P is FALSE: Soil particles formed by mechanical weathering that remain close to their origin are typically angular or sub-angular because they have not undergone significant transport, which is necessary for rounding through abrasion.
Statement Q is TRUE: The activity of clay (), defined as the ratio of the plasticity index to the percentage of clay-sized particles, is a direct indicator of the mineralogical composition and the potential for swelling and shrinkage. Higher activity values correspond to higher swell potential.
Therefore, P is FALSE and Q is TRUE.
Statement Q is TRUE: The activity of clay (), defined as the ratio of the plasticity index to the percentage of clay-sized particles, is a direct indicator of the mineralogical composition and the potential for swelling and shrinkage. Higher activity values correspond to higher swell potential.
Therefore, P is FALSE and Q is TRUE.
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