When vaporisation takes place directly at the heating surface, it is called________________?
Correct answer: A. Nucleate boiling
- A. Nucleate boiling
- B. Film boiling
- C. Vapour binding
- D. None of these
Explanation
In nucleate boiling, vapour bubbles form directly at the heated surface and detach into the liquid. In film boiling, a continuous vapour layer separates the liquid from the surface, so it is not the described condition.
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