Discussion
Arrange the steps of preparing grain for long-term storage in order:
1. Dry to the safe moisture content
2. Clean to remove trash, fines and damaged grain
3. Aerate to cool and equalise the bulk
4. Fill the store and level the surface
Select the correct sequence.
Answer: C
Correct answer: 2, 1, 4, 3
The order follows the logic of preparation. Cleaning comes first (2), because trash, fines and damaged grain carry the moisture, insect eggs and mould spores that cause trouble, and removing them also improves airflow through the bulk.
Drying to the safe moisture content follows (1), since storage stability depends on it. The store is then filled and the surface levelled (4) - levelling matters because a peaked surface gives very uneven airflow. Finally aeration cools and equalises the bulk (3), which is a continuing operation rather than a single step.
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