Drying operation under vacuum is carried out to __________________?
Correct answer: B. Reduce drying temperature
- A. Dry those materials which have very high unbound moisture content
- B. Reduce drying temperature
- C. Increase drying temperature
- D. Dry materials having high bound moisture content
Explanation
Vacuum lowers the boiling point of moisture, allowing evaporation at a lower temperature. This is useful for heat-sensitive materials, whereas vacuum is not intended to increase the drying temperature.
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