Workshop Technology
For welding plates of thickness more than 12.5 mm, its edges

Should have a double-V or U-groove on one side
Do not require bevelling
Should have a double-V or U-groove on both sides
Should be bevelled to a single-V or U-groove

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Workshop Technology
In a hot chamber die casting machine

Ferrous alloys with low melting temperature are casted
Ferrous alloys with high melting temperature are casted
Nonferrous alloys with low melting temperature are casted
Nonferrous alloys with high melting temperature are casted

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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 is earthed
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

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