Gce Model Questions Vol1 2022 Agricultural Science Question 41
Practice objective / multiple choice question 41 from the 2022 Gce Model Questions Vol1 Agricultural Science examination.
A batch of 500 kg of maize is at an initial moisture content of 20 % (wet basis). It must be dried to 13 % using a batch dryer in which the rate of moisture loss follows \(\frac{dM}{dt} = -k\,(M- M_e)\), where \(M\) is the current moisture content (wet basis), \(M_e = 10\%\) is the equilibrium moisture content and the drying constant \(k = 0.05\sqrt{T-20}\) h\(^{-1}\) with \(T\) the drying‑air temperature in °C. If the drying air temperature is 45 °C, calculate the total drying time required (in hours) to reach 13 % moisture.
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This is Gce Model Questions Vol1 2022 Agricultural Science Question 41. It is one of the objective questions from the 2022 Gce Model Questions Vol1 Agricultural Science examination.
Difficulty level: Hard .
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