Allied & ICAR Exam Bank • ALLIED_1323 MCQ • 1 Mark

Section 7: Dairy and Food Engineering

Thermal Processing and Kinetics

Subtopic: UHT Processing

Question Statement:

Ultra-High Temperature (UHT) continuous sterilization of milk typically operates in the processing regime of:

Options:

  • (A) 135 to 150 degrees Celsius for 2 to 5 seconds
  • (B) 63 degrees Celsius for 30 minutes
  • (C) 72 degrees Celsius for 15 seconds
  • (D) 100 degrees Celsius for 1 hour

Answer Key:

A

Step-by-Step Solution & Explanation

UHT processing utilizes $135-150^\circ\text{C}$ with holding times of $2-5\text{ seconds}$ to achieve complete commercial spore sterility while preserving milk sensory quality and proteins.
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