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_______ is used to freeze food at a tremendously fast rate.

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in Food Processing Unit Operations by (110k points)
_______ is used to freeze food at a tremendously fast rate.

(a) Fluidized bed freezer

(b) Plate freezer

(c) Cryogenic freezers

(d) Belt freezer

I got this question in a national level competition.

This key question is from Heat Transfer Applications in portion Heat Transfer Applications of Food Processing Unit Operations

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Correct answer is (c) Cryogenic freezers

Easy explanation: Cryogenic freezing is used to freeze food at a tremendously fast rate. The food is moved through a spray of liquid nitrogen. It can also be directly immersed in liquid nitrogen. The liquid nitrogen boils at a temperature of −196 °C around the food and thus extracts a huge amount of heat at faster pace.

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