A plate tears near the holes when ________.

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ALP CBT 2 Fitter Previous Paper: Held on 21 Jan 2019 Shift 3
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  1. the rivets and plates are of different metals
  2. the holes are near to each other
  3. diameter of rivet is too small
  4. the hole is away from the edge

Answer (Detailed Solution Below)

Option 2 : the holes are near to each other
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Detailed Solution

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Concept:

  • A rivet is a short cylindrical bar with a head integral to it. It is a permanent mechanical fastener.
  • The spacing of the rivet holes depends upon the job.
  • Too closely spaced rivets will tear the metal along the centerline of the rivets.

  • The distance from the edge of the metal to the center of any rivet should be at least twice the diameter of the rivet. 

  • The purpose of this is to prevent the splitting of the edges. 
  • The maximum distance from the edge should not be more than ten times the thickness of the plate.

  • Too much distance from the edge will lead to Gapping.

 

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