Question

_____________ freezers are used for deep freezing fish fillets.

(a) Air blast

(b) Slow type

(c) Normal

(d) Low velocity

The question was asked by my school teacher while I was bunking the class.

My enquiry is from Heat Transfer Applications in section Heat Transfer Applications of Food Processing Unit Operations

Answer 1

Correct answer is (a) Air blast

To elaborate: Air blast freezers are used for deep freezing fish fillets. In these freezers, the freezing process at a desired temperature takes place rapidly which varies from product to product. The micro crystallization takes place and thus preserving all the nutrients of the food. Once defrost is done, then there is no loss of firmness, liquid, and flavor.