Discussion
Match each storage measure in List I with what it controls in List II.
List I
A. Aeration
B. Fumigation
C. Hermetic sealing
D. Precooling
List II
1. Insects, by direct chemical action
2. Temperature and moisture migration
3. Field heat in a harvested perishable
4. Oxygen available within the bulk
Select the correct match.
Answer: B
Correct answer: A-2, B-1, C-4, D-3
Each measure is matched to what it controls. Aeration (A) controls temperature and, by removing the gradients that drive convection, moisture migration (2). Fumigation (B) controls insects by direct chemical action (1).
Hermetic sealing (C) controls the oxygen available within the bulk (4), letting respiration create a lethal atmosphere. Precooling (D) removes field heat from a harvested perishable (3) - the only item on the list concerning fruit and vegetables rather than grain, which is the pairing to identify first.
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