COMEDK · Chemistry · 11. s Block Elements
Railway wagon axles are made by heating iron rods embedded in charcoal powder.
This process is known as
- A tempering
- B case-hardening
- C sherardising
- D annealing
Answer & Solution
Correct Answer
(B) case-hardening
Step-by-step Solution
Detailed explanation
The process of hardening of iron rods of railway wagon axles embedded in charcoal powder is known as case-hardening. In this process surface of iron rods get hardened by depositing a layer of steel on its surface.
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