Carbon supply in pack carburising process is in the form of_____________________?
Correct answer: A. Charcoal
- A. Charcoal
- B. Calcium carbide
- C. Hydrocarbon oil
- D. Graphite
Explanation
Pack carburising surrounds the steel with a carbon-rich solid pack, traditionally charcoal, which supplies carbon at high temperature. The carbon diffuses into the surface and hardens it after treatment.
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