Question

Find the period if the initial and the final moisture content are 60% and 40%.  Also the critical moisture content is 30%.

(a) Constant rate period

(b) Falling rate period

(c) Unsaturated period

(d) None of the mentioned

I got this question by my college director while I was bunking the class.

The question is from Time period Calculation in Batch Drying in chapter Drying of Mass Transfer

Answer 1

Correct choice is (a) Constant rate period

For explanation I would say: Here the final moisture content is greater than critical moisture content so it must be a constant rate period.