Question

Discontinuous chips are formed during machining of:

• A. Cast iron
• B. Mild steel
• C. Aluminium
• D. Stainless steel

Hint:

For materials like cast iron, which are brittle, discontinuous chips are more likely to form. In contrast, ductile materials like mild steel and aluminium form continuous chips.

Answer 1

The Correct Option is A

Discontinuous chips are typically formed when machining brittle materials. Cast iron is a brittle material that tends to form discontinuous chips during machining due to its structure.
- Cast iron is correct because it is a brittle material, and it forms discontinuous chips when machined.
- Mild steel tends to form continuous chips when machined because it is a ductile material.
- Aluminium is also a ductile material and forms continuous chips during machining.
- Stainless steel is generally ductile, but depending on the grade, it can also form continuous chips during machining.
Thus, discontinuous chips are formed during machining of cast iron.