Allied & ICAR Exam Bank • ALLIED_0712 MCQ • 1 Mark

Section 7: Dairy and Food Engineering

Thermal Processing and Kinetics

Subtopic: Thermal Processing and Kinetics

Question Statement:

High-Temperature Short-Time (HTST) pasteurization of liquid milk officially requires continuous heating at:

Options:

  • (A) $71.7^\circ\text{C}$ ($72^\circ\text{C}$) for at least $15\text{ seconds}$
  • (B) $63^\circ\text{C}$ for $30\text{ minutes}$
  • (C) $135^\circ\text{C}$ for $2\text{ seconds}$
  • (D) $100^\circ\text{C}$ for $10\text{ minutes}$

Answer Key:

A

Step-by-Step Solution & Explanation

HTST pasteurization specifies $72^\circ\text{C}$ for 15 seconds, destroying all pathogenic non-spore-formers (specifically *Coxiella burnetii* and *Mycobacterium tuberculosis*).
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