Question

Find the period if the initial and the final moisture content are 50% and 20%.  Also the critical moisture content is 30%.

(a) Constant rate period

(b) Falling rate period

(c) saturated period

(d) None of the mentioned

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I want to ask this question from Time period Calculation in Batch Drying in division Drying of Mass Transfer

Answer 1

Correct choice is (b) Falling rate period

Explanation: Here the final moisture content is less than critical moisture content so it must be a falling rate period or unsaturated drying.