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How does humidity affect drying rate?

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+1 vote
in Food Processing Unit Operations by (110k points)
How does humidity affect drying rate?

(a) No effect

(b) Directly proportional

(c) Indirect proportional

(d) Linear increase

I had been asked this question during an interview.

My question is from Drying Rate topic in portion Drying of Food Processing Unit Operations

1 Answer

+2 votes
by (736k points)
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Best answer
Right answer is (b) Directly proportional

Best explanation: The rate of evaporation depends mainly on the relative humidity than on the temperature. But both the relative humidity and temperature are correlated. When the air temperature increases, it absorbs more liquid and the relative humidity decreases. Low relative humidity helps in faster drying.

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