Tank furnace used for melting of glass is made of___________________?
Correct answer: C. Refractory blocks
- A. Mild steel
- B. Cast iron
- C. Refractory blocks
- D. Stainless steel
Explanation
A glass tank furnace must withstand very high temperatures and attack by molten glass, so its basin and walls are built from refractory blocks. Ordinary mild steel, cast iron and stainless steel would not survive these conditions.
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