Neco Model Questions Vol1 2020 Agricultural Science Question 10
Practice objective / multiple choice question 10 from the 2020 Neco Model Questions Vol1 Agricultural Science examination.
A farmer harvests 500 kg of mangoes with an initial moisture content of 85 % (wet basis). He intends to dry them in a solar dryer that follows the moisture‑removal kinetics \(M(t) = M_{eq} + (M_0 - M_{eq})e^{-kt}\), where \(M\) is the water mass per kg dry matter, \(M_{eq}=0.2\) kg kg⁻¹, \(k=0.05\) h⁻¹, and \(M_0\) is the initial moisture ratio. The target moisture is 15 % (wet basis). Determine whether this target can be reached with the dryer. If not, state the lowest moisture percentage (wet basis) attainable and compute the total energy required to reach that moisture, assuming the latent heat of vaporisation is 2,430 kJ kg⁻¹ of water removed.
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About This Question
This is Neco Model Questions Vol1 2020 Agricultural Science Question 10. It is one of the objective questions from the 2020 Neco Model Questions Vol1 Agricultural Science examination.
Difficulty level: Hard .
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