In grain silo aeration, moisture migration occurs inside un-aerated grain bins primarily due to:
Options:
(A) Convection currents created by temperature gradients between the warm interior core and cooler outdoor sidewalls
(B) Earth's magnetic field
(C) Grain respiration producing ethanol
(D) Sunlight penetrating steel
Answer Key:
A
Step-by-Step Solution & Explanation
In winter, grain cools at bin walls and sinks, forcing warm air up through the warm center where it cools at the cold top surface and condenses, causing spoilage.