The GATE Grind

GATE 2022 MT – Question 24

Manufacturing Processes · Metal casting · 1 mark · Multiple choice

In green sand moulding, the casting defect resulting from the displacement of mould cavity by an oversized core is known as _________

  1. crush
  2. hot tear
  3. blow
  4. fin

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Show answer and explanation

Correct answer: (A) crush

Explanation

An oversized core mechanically displaces or crushes the mould cavity surface during assembly, causing a **crush defect, A**. Hot tears arise from constrained contraction and blows from gas.