Workshop Technology
Carburising flame is used to weld

Hard surfacing materials such as stellite
Steel, cast iron, copper, aluminium etc
Brass and bronze
All of these

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Workshop Technology
The welding set up is said to have straight polarity, when

Work is connected to the negative terminal and the electrode holder to the positive terminal
Work is connected to the positive terminal and the electrode holder to the negative terminal
Work is connected to the positive terminal and the electrode holder is earthed
Work is connected to the negative terminal and the electrode holder is earthed

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