The coefficient of permeability of gravel is-
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A.
Less than 10–6 cm/sec
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B.
Between 1 and 100 cm/sec
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C.
Between 1×10–6 and 1×10–3 cm/sec
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D.
Between 0.001 and 1 cm/sec
Correct Answer:
B. Between 1 and 100 cm/sec
Explanation:
The coefficient of permeability for gravel is typically high due to its large particle size and significant interconnected void spaces, which allow water to flow through easily. This value generally ranges between 1 and 100 cm/sec, making it one of the most permeable soil types compared to finer materials like silt or clay. Among the provided choices, the range of 1 to 100 cm/sec accurately represents the hydraulic conductivity of clean gravel.
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