Question

Which of the following is a coarse crusher used in mechanical operations?

• A. Ball Mill
• B. Jaw Crusher
• C. Hammer Mill
• D. Fluid Energy Mill

Hint:

\textbf{Jaw Crusher = Coarse crushing (primary stage).
Remember: Big rocks $\rightarrow$ Jaw Crusher.

Answer 1

The Correct Option is B

Concept: Size reduction in mechanical operations is classified into coarse, intermediate, and fine crushing. Different equipment is used depending on the desired size reduction.
Step 1: Understanding coarse crushing.
Coarse crushers are used for the initial size reduction of large solid materials into smaller lumps.
Step 2: Identifying the correct equipment.
The Jaw Crusher is a primary crusher widely used for coarse crushing. It works by compressing material between a fixed and a moving jaw.
Step 3: Eliminating incorrect options.

• Ball Mill is used for fine grinding.
• Hammer Mill is used for intermediate to fine crushing.
• Fluid Energy Mill is used for ultra-fine grinding.

Conclusion:
Thus, the correct answer is Jaw Crusher.