Question

What type of evaporators used for heat sensitive materials?

(a) Vacuum evaporators

(b) Vertical type evaporators

(c) Climbing film type evaporators

(d) Forced circulation evaporators

This question was posed to me during an internship interview.

I'm obligated to ask this question of Evaporation of Heat Sensitive Materials topic in chapter Evaporation of Food Processing Unit Operations

Answer 1

Correct answer is (a) Vacuum evaporators

To explain: Pressure is directly proportional to boiling point and vacuum evaporators work under low pressure or at high vacuum which results in reduced boiling point.