Workshop Technology
The hot working of metals is carried out

At the recrystallisation temperature
Above the recrystallisation temperature
Below the recrystallisation temperature
At any temperature

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

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

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