Question:
The property of moulding sand which enable to allow the escape of the gases from the mould is
The property of moulding sand which enable to allow the escape of the gases from the mould is
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Permeability = "Breathe-ability." It lets the mould "breathe" out gases so the metal stays solid.
Updated On: May 5, 2026
- Permeability
- Flowability
- Collapsability
- Infiltration
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The Correct Option is A
Solution and Explanation
Step 1: Concept During the casting process, molten metal poured into a sand mould generates steam and other gases from the moisture and binders in the sand.
Step 2: Meaning If these gases cannot escape, they become trapped in the metal, causing defects like blowholes or porosity.
Step 3: Analysis Permeability is the physical property of the porous moulding sand that allows these gases to pass through its pores easily.
Step 4: Conclusion Permeability is the vital property required for gas escape.
Final Answer: (A)
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