The GATE Grind

GATE 2019 ME (ME1) – Question 23

Casting, Forming and Joining Processes · Casting: patterns, moulds, cores, solidification, riser and gating design, defects · 1 mark · Multiple choice

In casting, the vertical passage carrying molten metal downward from pouring basin to runner is called ______.

  1. blister
  2. sprue
  3. riser
  4. pin hole

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Show answer and explanation

Correct answer: (B) sprue

Explanation

The **sprue, B**, is the vertical passage connecting the pouring basin to the runner. A riser is a reservoir feeding solidification shrinkage. Blisters and pinholes are defects, rather than parts of the gating system.