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