Question Bank • QB_SUB_DFE_REF_002 MCQ • 1 Mark

Section 7: Dairy and Food Engineering

Preservation of Food

Subtopic: Refrigeration and cold storage basics and applications

Question Statement:

In the design of agricultural cold stores, 'respiration heat' must be factored into the refrigeration load calculation for:

Options:

  • (A) Living horticultural produce such as fresh apples, potatoes, and oranges
  • (B) Frozen carcass meat stored at $-18^\circ\text{C}$
  • (C) Processed butter and pasteurized packaged milk
  • (D) Refined vegetable oil drums

Answer Key:

A

Step-by-Step Solution & Explanation

Fresh fruits and vegetables are living biological tissues that continue aerobic respiration ($C_6H_{12}O_6 + 6O_2 \to 6CO_2 + 6H_2O + \text{Heat}$) post-harvest, generating significant respiration heat.
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