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      Question

      Angle of friction and angle of repose

      are
      A Equal to each other Correct Answer Incorrect Answer
      B Not equal to each other Correct Answer Incorrect Answer
      C Proportional to each other Correct Answer Incorrect Answer
      D None of the above Correct Answer Incorrect Answer

      Solution

      The angle of repose or the critical angle of repose, of a granular material is the steepest angle of descent or dip of the slope relative to the horizontal plane when material on the slope face is on the verge of sliding. This angle is in the range 0°-90° .when bulk granular materials are poured onto a horizontal surface, a conical pile will form. The internal angle between the surface of the pile and the horizontal surface is known as the angle of repose and is related to the density, surface area and shapes of the particles, and the coefficient of friction of the material.

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