How to preserve food
  • 1. Which of these is NOT a common method of food preservation?
A) Drying
B) Canning
C) Digestion
D) Freezing
  • 2. What is the primary goal of food preservation?
A) Prevent spoilage
B) Make food more colorful
C) Increase cost
D) Change the flavor
  • 3. What does canning do to preserve food?
A) Adds vitamins
B) Increases acidity
C) Creates an airtight seal
D) Changes the texture
  • 4. What is the main principle behind drying food?
A) Adding sugar
B) Removing moisture
C) Increasing temperature
D) Adding salt
  • 5. Which of these foods is commonly preserved through pickling?
A) Apples
B) Bananas
C) Steak
D) Cucumbers
  • 6. What does freezing food primarily prevent?
A) Color fading
B) Microbial growth
C) Enzyme activity
D) Oxidation
  • 7. What substance is typically used in smoking food for preservation?
A) Vinegar
B) Oil
C) Sugar
D) Wood smoke
  • 8. What is irradiation used for in food preservation?
A) Killing microorganisms
B) Increasing nutrients
C) Adding flavor
D) Changing texture
  • 9. Which gas is sometimes used in modified atmosphere packaging (MAP)?
A) Nitrogen
B) Methane
C) Hydrogen
D) Oxygen
  • 10. What is the role of salt in curing meat?
A) Adds sweetness
B) Tenderizes meat
C) Increases moisture
D) Inhibits bacterial growth
  • 11. Which type of acid is commonly used in pickling?
A) Ascorbic acid
B) Citric acid
C) Lactic acid
D) Acetic acid
  • 12. What temperature range is generally considered the 'danger zone' for food safety?
A) 212°F - 250°F
B) 40°F - 140°F
C) 0°F - 32°F
D) 150°F - 212°F
  • 13. Which preservation method relies on removing air to prevent oxidation and spoilage?
A) Pasteurization
B) Fermentation
C) Vacuum packing
D) Brining
  • 14. What effect does sugar have on the water activity of food?
A) Decreases it
B) Increases it
C) Has no effect
D) Changes its pH
  • 15. What process involves heating liquids to kill bacteria and then cooling them?
A) Pasteurization
B) Sterilization
C) Blanching
D) Dehydration
  • 16. Which preservation method often uses a combination of salt, sugar, and spices?
A) Canning
B) Freezing
C) Curing
D) Drying
  • 17. What is the purpose of blanching vegetables before freezing them?
A) To change the texture
B) To inactivate enzymes
C) To add flavor
D) To remove vitamins
  • 18. Which type of food is most often preserved by fermentation?
A) Apples
B) Cabbage
C) Bread
D) Beef
  • 19. What is the role of microbes in food fermentation?
A) Eliminate nutrients
B) Add sugar
C) Produce acids
D) Increase moisture
  • 20. Which fruit is commonly preserved using the jam-making process?
A) Strawberries
B) Lettuce
C) Carrots
D) Potatoes
  • 21. What is the purpose of adding pectin to jam?
A) To help it gel
B) To increase acidity
C) To add flavor
D) To prevent spoilage
  • 22. Which of the following methods best preserves the nutritional value of food?
A) Canning
B) Pickling
C) Freezing
D) Drying
  • 23. What is the benefit of using a pressure canner for low-acid foods?
A) Is faster
B) Preserves color better
C) Uses less water
D) Reaches higher temperatures
  • 24. What type of container is generally NOT recommended for freezing liquids?
A) Glass jar filled to the top
B) Silicone container
C) Plastic freezer bag
D) Rigid plastic container
  • 25. What is 'water activity' in relation to food preservation?
A) Water temperature
B) Total water content
C) Available water for microbial growth
D) Water pH
  • 26. What is the main ingredient in brining?
A) Oil
B) Salt
C) Vinegar
D) Sugar
  • 27. Which of these is NOT a sign of spoilage in canned goods?
A) Bulging lid
B) Foul odor
C) Rusting can
D) Slight cloudiness
  • 28. What does 'aseptic packaging' mean?
A) Packaging made from recycled materials
B) Sterilized food in a sterilized container
C) Food packaged without preservatives
D) Packaging that is easy to open
  • 29. Why is it important to properly label and date preserved food?
A) To increase sales
B) To add nutritional information
C) To track storage time
D) To improve appearance
  • 30. What is a common ingredient used in preserving citrus fruits?
A) Oil
B) Salt
C) Vinegar
D) Sugar
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