The rate of scaling of furnace stock depends upon the_________________?
Correct answer: D. All A., B. and C.
- A. Temperature
- B. Time
- C. Nature of atmosphere
- D. All A., B. and C.
Explanation
Scaling is accelerated by higher temperature, longer exposure time, and an oxidising or otherwise favourable furnace atmosphere. Since all three operating factors influence scale growth, option d is the complete choice.
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