How to ferment native fruits for food preservation
  • 1. What is the primary purpose of fermenting fruits?
A) Sweetening
B) Increasing Fiber
C) Color Enhancement
D) Preservation
  • 2. Which microorganism is primarily responsible for fruit fermentation?
A) Yeast (in certain cases)
B) Virus
C) Lactic Acid Bacteria
D) Mold
  • 3. What is the role of salt in fruit fermentation?
A) Speeds up fermentation
B) Adds sweetness
C) Neutralizes acids
D) Inhibits undesirable bacteria
  • 4. What is the ideal temperature range for most fruit fermentations?
A) 60-75°F (15-24°C)
B) 80-90°F (27-32°C)
C) 32-40°F (0-4°C)
D) 100-110°F (38-43°C)
  • 5. What type of container is best for fruit fermentation?
A) Unlined ceramic
B) Aluminum
C) Copper
D) Glass or food-grade plastic
  • 6. Why is it important to keep fruits submerged during fermentation?
A) To prevent nutrient loss
B) To increase acidity
C) To speed up fermentation
D) To prevent mold growth
  • 7. What is the role of an airlock in fruit fermentation?
A) To keep the temperature constant
B) To filter out bacteria
C) To add oxygen to the fermentation
D) To allow gases to escape while preventing oxygen entry
  • 8. What does 'inoculation' mean in the context of fermentation?
A) Adding spices
B) Adding salt
C) Adding starter cultures
D) Adding sugar
  • 9. What is a 'brine' in fermentation?
A) A solution of sugar and water
B) A solution of lemon juice and water
C) A solution of salt and water
D) A solution of vinegar and water
  • 10. Which of these is a potential sign of spoilage during fermentation?
A) Cloudiness
B) Sediment formation
C) Mold growth
D) Bubbling
  • 11. What is the purpose of 'burping' a fermentation jar?
A) To check the temperature
B) To stir the contents
C) To release built-up gases
D) To add more oxygen
  • 12. Which fruit is commonly fermented into sauerkraut-like product?
A) Orange
B) Mango
C) Apple
D) Banana
  • 13. What is the benefit of using whey in fruit fermentation?
A) Adds color
B) Adds sweetness
C) Adds beneficial bacteria
D) Adds fiber
  • 14. What is a common ratio of salt to water for a basic fruit fermentation brine?
A) 10-15% salt
B) 2-5% salt
C) No salt needed
D) 0.5% salt
  • 15. Which native fruit is suitable for pickling through lacto-fermentation?
A) Ripe Mango
B) Green Papaya
C) Avocado
D) Ripe Banana
  • 16. How does fermentation affect the vitamin content of fruits?
A) Always decreases vitamin content
B) Can increase certain vitamins
C) Only affects water-soluble vitamins
D) Has no effect on vitamins
  • 17. What is the role of sugar in fruit fermentation?
A) Adds structure to the product
B) Inhibits microbial growth
C) Neutralizes acids
D) Provides food for microorganisms
  • 18. What is the 'bloom' on some fruits, and should it be removed before fermentation?
A) A natural wax coating, leave it on.
B) A type of mold, remove it.
C) A pesticide residue, remove it.
D) Added preservative, remove it.
  • 19. What type of salt should be avoided in fermentation?
A) Kosher salt
B) Pickling salt
C) Iodized salt
D) Sea salt
  • 20. What is a sign that fermentation is complete?
A) Increased bubbling
B) Brighter color
C) Formation of more mold
D) Reduced bubbling
  • 21. Can you ferment overripe fruits?
A) No, they are always unsuitable
B) Yes, but monitor closely for spoilage
C) Yes, they always ferment faster
D) Only if cooked first
  • 22. What is the role of spices like ginger or chili in fruit fermentation?
A) Neutralize acidity
B) Preserve color
C) Speed up fermentation
D) Add flavor and antimicrobial properties
  • 23. What is the 'lacto' in 'lacto-fermentation' referring to?
A) Lactose sugar
B) Milk products
C) Lactic acid
D) Lactobacillus bacteria
  • 24. Why is it important to use clean equipment in fruit fermentation?
A) To improve flavor
B) To increase acidity
C) To prevent contamination
D) To speed up fermentation
  • 25. How long does fruit fermentation typically take?
A) 1-2 days
B) Several days to weeks
C) A few hours
D) Months to years
  • 26. What happens to the pH level of fruit during fermentation?
A) It fluctuates randomly
B) It stays the same
C) It increases (becomes more alkaline)
D) It decreases (becomes more acidic)
  • 27. How should fermented fruits be stored after fermentation?
A) Refrigerated
B) At room temperature
C) Frozen
D) In a warm place
  • 28. What is a common fruit that can be fermented into a vinegar?
A) Coconut
B) Mango
C) Banana
D) Apple
  • 29. What does it mean to 'backslop' in fermentation?
A) Reversing the fermentation process
B) Using some of a previous batch to start a new one
C) Adding sugar after fermentation
D) Filtering the ferment
  • 30. What is the main reason for weighting the fruits down with a weight during fermentation?
A) To prevent the jar from cracking.
B) To keep the fruit submerged under the brine
C) To slow down the fermentation process.
D) To speed up the fermentation process.
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