Discussion
Make the correct match between specific food processing operations in Group I with their mechanism of action in Group II.
| Group I | Group II |
|---|---|
| P) Ball Mill | 1) Compression and shear |
| Q) Roller Mill | 2) Pressure bursting |
| R) Flash Peeling | 3) Friction and shear |
| S) Abrasive Peeling | 4) Impact and shear |
Answer: B
The match is P-4, Q-1, R-2, S-3.
- A ball mill reduces size by the impact of falling balls and the shear between them.
- A roller mill crushes material between rotating rolls by compression, with shear when the rolls turn at different speeds.
- Flash (steam) peeling exposes produce to high-pressure steam and then releases the pressure suddenly, so steam under the skin bursts it off.
- Abrasive peeling rubs the skin off against rough rollers or carborundum surfaces, by friction and shear.
The other options swap these mechanisms, for example making the roller mill act by pressure bursting.
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