+1 vote
in Food Engineering by (93.7k points)
Which of the following is also called a ring dryer?

(a) Pneumatic conveyor dryer

(b) Drum dryer

(c) Freeze dryer

(d) Spray dryer

I got this question in an internship interview.

This intriguing question comes from Unit Operations topic in chapter Heat Transfer Equipment, Microwave Heating, Evaporation, Diffusion and Mass Transfer and Dehydration of Food Engineering

1 Answer

+2 votes
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Best answer
Correct choice is (a) Pneumatic conveyor dryer

For explanation I would say: Pneumatic conveyor dryer is also called a ring dryer because the feed is made to pass through a loop at one point and comes back there. (Not always-depends on drying)

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