Question:
Complete the analogy: Avoids mould sticking: Parting sand :: Improves surface finish :
Complete the analogy: Avoids mould sticking: Parting sand :: Improves surface finish :
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Facing sand is the most refined sand layer in moulding and directly affects casting finish.
Updated On: Jun 29, 2026
- Backing sand
- Facing sand
- System sand
- Core sand
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The Correct Option is B
Solution and Explanation
Concept:
In moulding sand practice, different types of sands are used for different purposes. Parting sand is used to prevent sticking of mould surfaces, while facing sand is used to improve the surface finish of the casting.
Step 1: Understand parting sand function.
Parting sand is applied at the moulding surface interface to:
• prevent adhesion between cope and drag
• allow easy separation of mould halves
Step 2: Identify sand used for surface quality.
Facing sand is the layer of sand directly in contact with molten metal. It:
• provides smooth surface finish
• resists thermal shock
• ensures good casting surface quality Final Answer: \[ \boxed{\text{Facing sand}} \]
Step 1: Understand parting sand function.
Parting sand is applied at the moulding surface interface to:
• prevent adhesion between cope and drag
• allow easy separation of mould halves
Step 2: Identify sand used for surface quality.
Facing sand is the layer of sand directly in contact with molten metal. It:
• provides smooth surface finish
• resists thermal shock
• ensures good casting surface quality Final Answer: \[ \boxed{\text{Facing sand}} \]
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