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Canning in Chemical Process Industries

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Questions and Answers

What is the primary purpose of heat treatment in food preservation?

To alter the texture of the food

To kill microorganisms and extend shelf life (correct)

To change the color of the food

To enhance the flavor of the food

What is the typical temperature used for heat treatment in canning?

150 ̊C

180 ̊C

100 ̊C

121 ̊C (correct)

Which material is often used as a lining in untinned steel cans?

Plastic (correct)

Glass

Tin

Aluminum

What is the primary microorganism that heat treatment aims to destroy in canning?

Clostridium botulinum Signup and view all the answers

In which type of vessel are containers placed for heat treatment?

Steam pressure vessel Signup and view all the answers

What is the primary purpose of reducing water content in food before freezing?

To prevent unwanted changes in the final product Signup and view all the answers

What happens to the volume of fruit juices after concentration?

It is reduced to one-third of the original volume Signup and view all the answers

What is the resulting solid content percentage of milk after evaporation?

45% solid content Signup and view all the answers

What is the purpose of blanching before freezing?

To inactivate enzymes and prevent unwanted changes Signup and view all the answers

How many processes are available for food concentration?

3 Signup and view all the answers