How is the heating of surface done in flame hardening technique? Options: A . &nbspOxy-acetylene torch B . &nbspCarburizing flame C . &nbspElectrode D . &nbspDirect sunlight

How is the heating of surface done in flame hardening technique?

Question - How is the heating of surface done in flame hardening technique?

Options:

A . Oxy-acetylene torch

B . Carburizing flame

C . Electrode

D . Direct sunlight

Answer: Option A
Answer: (a).Oxy-acetylene torch

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