Material of construction of foundry crucible is _________________?
Correct answer: C. Graphite
- A. Lead
- B. Stainless steel
- C. Graphite
- D. Cast iron
Explanation
Graphite crucibles tolerate very high temperatures and resist chemical attack by many molten metals. Lead, cast iron, and ordinary stainless steel are unsuitable for the severe thermal conditions of a foundry crucible.
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