Neco 2022 Agricultural Science Question 19
Practice objective / multiple choice question 19 from the 2022 Neco Agricultural Science examination.
A batch of 1000 kg fresh cassava chips contains 45 % moisture (wet basis). The chips must be dried to 12 % moisture (wet basis). The drying air enters the dryer at 30 °C and 40 % relative humidity and leaves at 45 °C and 20 % relative humidity. The air flow rate is 2 m³ s⁻¹, air density is 1.2 kg m⁻³, and the atmospheric pressure is 101.3 kPa. Saturation vapour pressures are 4.24 kPa at 30 °C and 9.59 kPa at 45 °C. Assuming all moisture removed is carried away by the air, estimate the drying time in hours, rounding to the nearest whole hour.
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About This Question
This is Neco 2022 Agricultural Science Question 19. It is one of the objective questions from the 2022 Neco Agricultural Science examination.
Difficulty level: Hard .
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