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Mass Transfer

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Questions and Answers

What is the definition of drying?

The process of removing all moisture from the grain

The process of removing heat from the grain

The process of increasing the moisture content of the grain

The process of removing excess moisture from the grain (correct)

What is the equilibrium moisture content (EMC)?

The level of moisture at which the grain is in equilibrium with the surrounding air

The maximum level of moisture to which grain can be dried under a given set of drying conditions

The level of moisture at which the grain is completely dehydrated

The minimum level of moisture to which grain can be dried under a given set of drying conditions (correct)

What is the difference between drying and dehydration?

Drying and dehydration are the same process

Drying is the removal of all moisture, while dehydration is the removal of excess moisture

Drying is the removal of excess moisture, while dehydration is the removal of all moisture (correct)

Drying is the process of adding moisture, while dehydration is the process of removing moisture

What is the purpose of drying in postharvest operations?

To render the grain safe for storage Signup and view all the answers

What is the respiration process in the grain?

The process of utilizing oxygen and releasing energy in the form of heat Signup and view all the answers

What is the definition of mass transfer?

A process which is a result of diffusion from regions of high concentration to regions of low concentration Signup and view all the answers

What is the primary purpose of drying in postharvest operations?

To prevent deterioration in quality Signup and view all the answers

What is the equilibrium moisture content (EMC)?

The moisture content of the grain when no moisture transfer occurs Signup and view all the answers

What is the process of complete or near complete removal of moisture called?

Dehydration Signup and view all the answers

What happens to crop grains when the vapour pressure of the moisture within the grain is higher than that of the moisture in the atmosphere?

The grain will lose its moisture to the surrounding air Signup and view all the answers

Mass Transfer

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Questions and Answers

What is the definition of drying?

What is the equilibrium moisture content (EMC)?

What is the difference between drying and dehydration?

What is the purpose of drying in postharvest operations?

What is the respiration process in the grain?

What is the definition of mass transfer?

What is the primary purpose of drying in postharvest operations?

What is the equilibrium moisture content (EMC)?

What is the process of complete or near complete removal of moisture called?

What happens to crop grains when the vapour pressure of the moisture within the grain is higher than that of the moisture in the atmosphere?

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