Question

How long does freeze drying take?

(a) 10 to 40 hours

(b) 20 to 40 hours

(c) 30 to 50 hours

(d) 5 to 20 hours

I had been asked this question by my school teacher while I was bunking the class.

Asked question is from Freeze Drying topic in portion Drying of Food Processing Unit Operations

Answer 1

The correct answer is (c) 30 to 50 hours

The best I can explain: It takes between 20 to 40 hours to complete the process. Food type, quantity, thickness affects the freeze-dry cycle. Products like peas, meat, corn dry quickly whereas squash can take longer.