Gce Model Questions Vol1 2021 Agricultural Science Question 42
Practice objective / multiple choice question 42 from the 2021 Gce Model Questions Vol1 Agricultural Science examination.
A farmer harvests 10 t of maize with an initial moisture content of 25 % (wet basis). The desired final moisture content for safe storage is 13 % (wet basis). Drying occurs in two phases: (i) a constant‑rate phase that removes moisture at 0.5 t day(^{-1}) until the moisture content reaches 20 %; (ii) a falling‑rate phase described by \(\frac{dM}{dt} = -k\,(M-M_e)\) with \(k = 0.04\ \text{day}^{-1}\) and equilibrium moisture \(M_e = 12\%\). Calculate the total drying time (in days) required to reach 13 % moisture.
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About This Question
This is Gce Model Questions Vol1 2021 Agricultural Science Question 42. It is one of the objective questions from the 2021 Gce Model Questions Vol1 Agricultural Science examination.
Difficulty level: Hard .
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