Question

Hammer mill uses force for size reduction.

• A. Attrition
• B. Crushing
• C. Impact
• D. Impact and attrition

Hint:

Hammer hits the nail (Impact). Hammer Mill hits the drug (Impact).

Answer 1

The Correct Option is C

Step 1: Concept
Size reduction involves breaking large solid particles into smaller ones using mechanical forces like impact, attrition, compression, or cutting.

Step 2: Meaning
Impact occurs when a fast-moving object hits a stationary particle or a particle hits a stationary surface.

Step 3: Analysis
A Hammer mill consists of a high-speed rotor with attached hammers. When material is fed, the hammers strike the particles at high velocity, shattering them. The primary mechanism involved is purely impact.

Step 4: Conclusion
Unlike ball mills (which use impact and attrition), the hammer mill operates primarily on the principle of impact.

Final Answer: (C)