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18 Questions

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Food Preservation Methods

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Questions and Answers

What is the primary mechanism of freeze drying?

Dehydration using acidification

Sublimation of ice at low pressure (correct)

Evaporation of water using heat

Osmotic pressure difference

What is the primary function of solar drying in the food industry?

To minimize waste and reduce drying time (correct)

To ferment food using beneficial bacteria

To increase the osmotic pressure of food

To preserve food using acidification

What is the principle behind osmotic dehydration?

Removal of water using heat

Removal of water using sublimation

Removal of water due to osmotic pressure difference (correct)

Removal of water using acidification

What is the purpose of salting and brining in food preservation?

To draw out moisture and inhibit microbial growth Signup and view all the answers

What is the primary advantage of solar drying over sun drying?

Solar drying is faster Signup and view all the answers

What is not mentioned as a technique of food preservation in the text?

Controlled Atmosphere Storage Signup and view all the answers

What is the process of removing moisture from produce through the application of heat from air flow?

Convection Drying Signup and view all the answers

What is the process of preserving food by reducing the water content using a concentrated solution?

Osmotic Dehydration Signup and view all the answers

What type of storage method regulates temperature, humidity, and gas concentrations to preserve food?

Controlled Atmosphere Storage Signup and view all the answers

What process uses the sun's heat to dry fruits and vegetables?

Solar Drying Signup and view all the answers

What is the process of preserving food by freezing the water content and then reducing the surrounding pressure to allow the frozen water to sublimate?

Freeze-Drying Signup and view all the answers

What method of food preservation is based on exposing food to temperatures below its freezing point?

Freezing Signup and view all the answers

What type of products commonly use active packaging?

Fresh fruit, vegetables, meat, and fish Signup and view all the answers

What three gases are commonly used in active packaging?

Oxygen, carbon dioxide, and nitrogen Signup and view all the answers

What is the ideal temperature range for storing fresh fruits and vegetables?

32 to 55°F Signup and view all the answers

What is the purpose of high pressure processing in food preservation?

To apply intense pressure to kill pathogens and spoilage organisms Signup and view all the answers

What is the role of ozone gas in food preservation?

To sanitize produce and extend shelf life Signup and view all the answers

What is the purpose of pulse electric field treatment in food preservation?

To inhibit microbial growth and extend shelf life Signup and view all the answers