Question

Which one is a common equipment used for size reduction of food grains?

• A. Centrifuge
• B. Filter press
• C. Hammer mill
• D. Plate heat exchanger

Hint:

Grinding/milling = Hammer mill. Separation ≠ size reduction.

Answer 1

The Correct Option is C

Concept: Size reduction is an important unit operation in food processing, where large particles are broken down into smaller ones. This is commonly done using mechanical equipment.

Step 1: Understanding size reduction.
It involves:
• Crushing
• Grinding
• Milling

Step 2: Equipment used.
Common equipment includes:
• Hammer mills
• Roller mills
• Attrition mills

Step 3: Evaluating options.
• Centrifuge — Used for separation based on density
• Filter press — Used for solid-liquid separation
• Hammer mill — Used for grinding grains (correct)
• Plate heat exchanger — Used for heat transfer

Step 4: Final reasoning.
Only hammer mill is directly involved in size reduction. Final Conclusion:
Hammer mill is used for size reduction of grains. Hence, option (3) is correct.