Which of the following bricks should not be used, if the furnace is to be used intermittently ?
Correct answer: D. Silica bricks
- A. Firebricks
- B. Sillimanite
- C. Silicon carbide bricks
- D. Silica bricks
Explanation
Silica bricks undergo significant volume changes and have poor resistance to thermal shock during repeated heating and cooling. They are therefore unsuitable for intermittently operated furnaces, unlike more thermally shock-resistant choices.
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