Question

The freezer used for freezing of irregular shaped fish is

• A. Air blast freezer
• B. Plate freezer
• C. Cryogenic freezer
• D. Tunnel freezer

Hint:

- Uniform blocks/fillets = Plate freezer (highly efficient contact transfer).
- Irregular whole fish = Air blast freezer (flexible convective transfer).

Answer 1

The Correct Option is A

Step 1: Understanding the Concept:
Freezing technologies are chosen based on the shape, size, packing, and quality requirements of the fish products.

Step 2: Detailed Explanation:
- Plate freezers: Require products to have flat, uniform, and rectangular shapes (such as packaged fillets or fish blocks) to ensure direct contact with the freezing plates. They cannot freeze whole, irregular-shaped fishes efficiently.
- Air blast freezers: Use high-velocity, extremely cold air (\(-30\text{ to }-40^\circ\text{C}\)) circulating around the product. Because air can flow freely around any geometric surface, it is highly versatile and remains the ideal choice for freezing whole, irregular-shaped fish.

Step 3: Final Answer:
The freezer used for irregular-shaped fish is the Air blast freezer, corresponding to option (A).