Question

One disadvantage with backward feeding is that the feed gets very concentrated at the beginning few units itself and hence it’s difficult to feed it to the next evaporator unit.

(a) True

(b) False

This question was addressed to me in an interview for job.

This is a very interesting question from Unit Operations topic in division Heat Transfer Equipment, Microwave Heating, Evaporation, Diffusion and Mass Transfer and Dehydration of Food Engineering

Answer 1

The correct answer is (b) False

Easy explanation: One disadvantage with forward feeding is that the feed gets very concentrated at the beginning few units itself (due to direct steam supply with provides high heat) and hence it’s difficult to feed it to the next evaporator unit.