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Warping of a section under torsion is prevented at

  • A.A free end
  • B.Any point on a circular shaft
  • C.A built-in end or heavy fitting
  • D.The mid-span of a uniform member

Answer: C

Where the axial displacements the section wants to make are resisted, direct stresses appear that pure torsion theory does not predict. A circular shaft is the exception, since it wants to make no such displacements in the first place.

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