The GATE Grind

GATE 2025 PI – Question 23

Manufacturing Processes I · Casting · 1 mark · Multiple choice

Which casting defect can result when molten metal is supplied through two gates?

  1. Cold shut
  2. Shift
  3. Pin hole
  4. Rat tail

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Show answer and explanation

Correct answer: (A) Cold shut

Explanation

Two advancing metal streams can meet after cooling or oxidizing enough to prevent complete fusion. The resulting seam is a **cold shut, A**. The other defects arise from mold displacement, gas or mold-surface expansion.

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