Blast Freezers and Airflow Configurations

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What is a disadvantage of freeze-drying as mentioned in the text?

Low Energy Consumption

Cheap Equipment

No impact on product structure

Long Drying Times (correct)

Which factor influences the drying process by facilitating faster sublimation?

Maintaining high product temperature

Lower pressure (correct)

Product size, shape, and water content

Higher pressure

What is a key factor affecting the potential quality changes during the freeze-drying process?

The speed of the vacuum pump

The ambient humidity in the drying chamber

The color of the product

The product's size, shape, and water content (correct)

How does shelf heating in freeze dryers contribute to the process?

It enhances sublimation rates Signup and view all the answers

Why are some products unsuitable for freeze-drying?

They lose their structure or texture Signup and view all the answers

What characteristic makes dried products lightweight and easy to transport?

Minimal water content Signup and view all the answers

What is the primary purpose of fans circulating air at high velocity throughout the blast freezer chamber?

Efficiently remove heat from the product surface Signup and view all the answers

Which airflow configuration in blast freezers is most suitable for products on hanging racks or conveyor belts?

Vertical Airflow Signup and view all the answers

In which food category are blast freezers commonly used to freeze whole carcasses and individual cuts?

Meat Signup and view all the answers

What type of blast freezer design can minimize air bypassing the product?

Vertical Airflow Signup and view all the answers

Which type of product processing is Spiral Blast Freezer design ideal for?

High-volume processing Signup and view all the answers

What is one of the main purposes of blast freezers in relation to pre-prepared meals?

Minimizing spoilage Signup and view all the answers

What is the main principle behind tray dryers?

Convective heat transfer Signup and view all the answers

Which component of a tray dryer is responsible for removing moisture-laden air from the chamber?

Exhaust System Signup and view all the answers

What is the primary function of the air circulation system in a tray dryer?

Circulating hot air throughout the chamber Signup and view all the answers

Which type of dryer is a tray dryer also known as?

Cabinet dryer Signup and view all the answers

What is the purpose of the heating system in a tray dryer?

To heat the air within the chamber Signup and view all the answers

Why is a tray dryer considered a popular choice for small-scale and batch drying processes?

For its simple design and efficient operation Signup and view all the answers

Which type of filtration is suitable for low-pressure applications?

Gravity Filtration Signup and view all the answers

In which type of filtration is a vacuum created on the filtrate side of the filter?

Vacuum Filtration Signup and view all the answers

Which type of filtration is commonly used for clarifying liquids with high solid content?

Depth Filtration Signup and view all the answers

What does membrane filtration use to allow specific sized molecules or ions to pass through?

Selective membrane Signup and view all the answers

Which industry finds applications in purifying chemicals, separating catalysts, and recovering valuable products from reaction mixtures?

Chemical Industry Signup and view all the answers

What is the primary purpose of water treatment filtration processes?

Removing impurities and microorganisms from water Signup and view all the answers

What is the main function of the transparent cover in solar dryers?

Allow sunlight to penetrate and heat the drying chamber Signup and view all the answers

What is the purpose of the ventilation system in a solar dryer?

Promote air circulation and moisture removal Signup and view all the answers

Why is insulation sometimes incorporated into the walls of a solar dryer?

To help retain heat and improve drying efficiency Signup and view all the answers

In which type of solar dryer are products exposed directly to sunlight within the drying chamber?

Direct Solar Dryers Signup and view all the answers

What distinguishes indirect solar dryers from direct solar dryers?

Sunlight heats a separate solar collector in indirect dryers Signup and view all the answers

What is a common feature of solar dryers that aids in continuous drying?

Facilitated air circulation for moisture removal Signup and view all the answers