Fruit juice (a heat sensitive material) can be concentrated in a ____________ evaporator?
Correct answer: B. Falling film
- A. Long tube
- B. Falling film
- C. High pressure
- D. None of these
Explanation
A falling-film evaporator provides a short residence time and thin liquid film, limiting thermal damage to heat-sensitive juice. This makes it preferable to arrangements that expose the product to prolonged heating.
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