Allied & ICAR Exam Bank • ALLIED_1000 MCQ • 1 Mark

Section 7: Dairy and Food Engineering

Thermal Processing and Sterilization

Subtopic: Pasteurization and Sterilization

Question Statement:

In commercial aseptic processing and packaging of low-acid particulate foods (pH > 4.6), the primary public health design criterion for validating continuous sterilization is achieving a minimum thermal process lethality at the slowest heating particle core of:

Options:

  • (A) $F_0 \ge 3.0\text{ minutes}$ (a 12-decimal reduction, $12D$, of *Clostridium botulinum* spores)
  • (B) $F_0 = 0.1\text{ second}$
  • (C) $F_0 = 120\text{ minutes}$
  • (D) $F_0 = 0$

Answer Key:

A

Step-by-Step Solution & Explanation

For low-acid canned and aseptically packaged foods, global regulatory and food safety standards mandate a minimum $12D$ botulinum cook ($F_0 \ge 2.52-3.0\text{ min}$ at $121.1^\circ\text{C}$ with $z = 10^\circ\text{C}$), guaranteeing commercial sterility and consumer safety against botulism.
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