Workshop Technology
In a four high rolling mill, the diameter of backing up rolls is ________ the diameter of working rolls.

Equal to
None of these
Smaller than
Larger than

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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 is earthed
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

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