Which of the following represents the size classification for cobble in millimeters?

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Multiple Choice

Which of the following represents the size classification for cobble in millimeters?

The classification of cobble in terms of particle size is generally recognized in soil mechanics and geotechnical engineering. Cobble is defined as a coarse-grained material, and its size classification typically varies between 60 millimeters to 200 millimeters. This designation is based on standard geological classifications, which categorize materials based on their diameters. Understanding this classification is crucial in fields such as civil engineering and environmental science, where the size of aggregates can significantly influence properties like drainage, stability, and compaction of soils. The other choices represent different classifications: the range of 0.075 to 2 millimeters pertains to silt and fine sand, and 2 to 60 millimeters corresponds to gravel. The option greater than 200 millimeters describes boulders, which are a larger category than cobbles. Therefore, the selection that accurately reflects the size classification of cobble is from 60 to 200 millimeters.

The classification of cobble in terms of particle size is generally recognized in soil mechanics and geotechnical engineering. Cobble is defined as a coarse-grained material, and its size classification typically varies between 60 millimeters to 200 millimeters. This designation is based on standard geological classifications, which categorize materials based on their diameters.

Understanding this classification is crucial in fields such as civil engineering and environmental science, where the size of aggregates can significantly influence properties like drainage, stability, and compaction of soils.

The other choices represent different classifications: the range of 0.075 to 2 millimeters pertains to silt and fine sand, and 2 to 60 millimeters corresponds to gravel. The option greater than 200 millimeters describes boulders, which are a larger category than cobbles. Therefore, the selection that accurately reflects the size classification of cobble is from 60 to 200 millimeters.

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