The GATE Grind

GATE 2019 MT – Question 32

Manufacturing Processes · Metal forming · 1 mark · Multiple choice

Alligatoring is a defect commonly observed in

  1. Extrusion
  2. Deep drawing
  3. Sheet-metal forming
  4. Rolling

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Show answer and explanation

Correct answer: (D) Rolling

Explanation

Alligatoring is splitting of a rolled slab along its thickness, opening the ends like an alligator’s mouth. Nonuniform deformation and internal defects can initiate this separation. It is therefore associated with rolling, D.

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