Home › MCQs › Food Science and Technology › Question #5894
Back to Questions
Food Science and Technology QUESTION #5894
Question 1
Which correctly describes the order of operations in a typical HTST pasteurization system?
  • Raw milk \(\rightarrow\) pasteurizer \(\rightarrow\) regeneration \(\rightarrow\) holding tube \(\rightarrow\) cooling \(\rightarrow\) packaging
  • Raw milk \(\rightarrow\) regeneration (heating) \(\rightarrow\) pasteurizer \(\rightarrow\) holding tube \(\rightarrow\) cooling \(\rightarrow\) packaging
  • Raw milk \(\rightarrow\) filter \(\rightarrow\) regeneration (heating) \(\rightarrow\) holding tube \(\rightarrow\) regeneration (cooling) \(\rightarrow\) chiller \(\rightarrow\) packaging✔️
  • Raw milk \(\rightarrow\) homogenizer \(\rightarrow\) holding tube \(\rightarrow\) regeneration \(\rightarrow\) pasteurization \(\rightarrow\) packaging
Correct Answer Explanation
In HTST pasteurization: raw cold milk enters the regeneration section (heated by outgoing hot pasteurized milk to \(\approx 57\text{–}65^{\circ}\text{C}\), saving \(\approx 75\%\) energy), then enters the heating section (to \(\geq 72^{\circ}\text{C}\)), passes through the holding tube (\(\geq 15\) seconds), returns through regeneration (cooling) and a chiller before packaging.