Question Bank • QB_APE_EXP_055
MCQ • 1 Mark
Section 6: Agricultural Process Engineering
Storage Systems
Subtopic: Controlled and modified atmosphere storage
Question Statement:
The phenomenon of chilling injury in tropical and subtropical fruits (such as bananas and mangoes) occurs when they are stored at:
Options:
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(A) Temperatures above freezing but below their critical threshold temperature (typically lt; 10 - 13^\circ\text{C}$)
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(B) Sub-zero temperatures below $-5^\circ\text{C}$ due to ice crystallization
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(C) High ambient temperatures above $40^\circ\text{C}$
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(D) Zero relative humidity conditions
Step-by-Step Solution & Explanation
Chilling injury is physiological damage resulting from exposure to low, non-freezing temperatures (typically $0 - 14^\circ\text{C}$). Tropical fruits suffer phase transition in cell membrane lipids, causing pitting, surface lesions, failure to ripen, and internal browning.
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