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The angle of orientation of the spheres in the maximum possible voids ratio is ______

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in Geotechnical Engineering I by (102k points)
The angle of orientation of the spheres in the maximum possible voids ratio is ______

(a) 60°

(b) 90°

(c) 30°

(d) 75°

The question was asked in an interview for internship.

This intriguing question comes from Packing of Uniform Spheres in section Preliminary Definitions and Relationships of Geotechnical Engineering I

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The correct option is (b) 90°

The best I can explain: The soil will have maximum possible voids when the soil grains are arranged in a cubical array of spheres. In a cubical array, the angle of orientation α = 90°.

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