Gce Model Questions Vol1 2021 Agricultural Science Question 20
Practice objective / multiple choice question 20 from the 2021 Gce Model Questions Vol1 Agricultural Science examination.
Grain stored in a silo generates metabolic heat at a rate of 0.04\,W per kilogram. A batch of 2000\,kg of wheat is stored, and the ambient air temperature is 20\,°C. To prevent the grain temperature from rising more than 2\,°C above ambient, the silo must be ventilated. Air has a density of 1.2\,kg\,m\^{-3} and a specific heat capacity of 1005\,J\,kg\^{-1}\,K\^{-1}. Assuming the ventilation air enters at the ambient temperature, calculate the minimum ventilation rate required in cubic metres per minute (rounded to one decimal place).
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This is Gce Model Questions Vol1 2021 Agricultural Science Question 20. It is one of the objective questions from the 2021 Gce Model Questions Vol1 Agricultural Science examination.
Difficulty level: Hard .
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