Allied & ICAR Exam Bank • ALLIED_0687 MCQ • 1 Mark

Section 7: Dairy and Food Engineering

Heat and Mass Transfer in Food Processing

Subtopic: Heat and Mass Transfer in Food Processing

Question Statement:

In dairy processing, the regeneration section of a Plate Heat Exchanger (PHE) pasteurizer saves thermal energy by:

Options:

  • (A) Using hot pasteurized milk leaving the holding tube to preheat incoming cold raw milk
  • (B) Burning milk fat as fuel
  • (C) Adding boiling water to raw milk
  • (D) Operating under vacuum only

Answer Key:

A

Step-by-Step Solution & Explanation

Regenerative heat exchange transfers sensible heat directly between outgoing pasteurized milk and incoming cold raw milk, achieving $85-92\%$ thermal regeneration efficiency.
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