Podcast
Questions and Answers
What is the purpose of pasteurization in acidic foods?
What is the purpose of pasteurization in acidic foods?
- To reduce the acidity of the foods
- To increase the shelf life by destroying micro-organisms and enzymes (correct)
- To change the color of the foods
- To enhance the nutritional value
How is sensible heat calculated during pasteurization?
How is sensible heat calculated during pasteurization?
- $Q = mc(\theta B - \theta A)$
- $Q = m/c(\theta A - \theta B)$
- $Q = m/c(\theta B - \theta A)$
- $Q = mc(\theta A - \theta B)$ (correct)
In pasteurization of unpackaged foods, what is a suitable heat exchanger for more viscous foods?
In pasteurization of unpackaged foods, what is a suitable heat exchanger for more viscous foods?
- Plate Heat Exchangers
- Swept Surface Heat Exchangers
- Concentric Tube Heat Exchanger (correct)
- Open Boiling Pans
How are glass containers handled in pasteurization to reduce thermal shock?
How are glass containers handled in pasteurization to reduce thermal shock?
What is the maximum temperature difference allowed between glass containers and water for heating?
What is the maximum temperature difference allowed between glass containers and water for heating?
How is food usually cooled after pasteurization?
How is food usually cooled after pasteurization?
What are the changes to nutritional and sensory characteristics of most foods after pasteurization?
What are the changes to nutritional and sensory characteristics of most foods after pasteurization?
Flashcards
Why pasteurize acidic foods?
Why pasteurize acidic foods?
To increase shelf life by eliminating microorganisms and enzymes.
Sensible heat calculation
Sensible heat calculation
Q = mc(θA - θB), where Q is heat, m is mass, c is specific heat, and θ is temperature.
Viscous Food Heat Exchanger
Viscous Food Heat Exchanger
Concentric Tube Heat Exchanger
Glass Container Handling
Glass Container Handling
Signup and view all the flashcards
Max. Temperature Difference
Max. Temperature Difference
Signup and view all the flashcards
Cooling post-pasteurization
Cooling post-pasteurization
Signup and view all the flashcards
Nutritional/Sensory Changes
Nutritional/Sensory Changes
Signup and view all the flashcards
