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What is the recommended distance from the edge of the metal to the centre of any rivet to avoid tearing, if D is the diameter of the rivet?

  • A.4D
  • B.3D
  • C.2D
  • D.1D

Answer: C

When a rivet is placed near the edge of a metal plate, the metal between the rivet and the edge can tear out if the rivet is too near. To avoid tearing, the distance from the edge of the metal to the centre of the rivet is taken as 2D, where D is the diameter of the rivet, which is the key's answer, option (C). A distance of 1D would be too small and the metal would tear, while 3D and 4D waste material without any need.

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