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 high melting temperature are casted
Nonferrous alloys with low 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 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 negative terminal and the electrode holder to the positive terminal

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Workshop Technology
The diaphragm moulding machine is used to

Produce uniform packing of sand in the mould
Ram the sand harder at the pattern face with decreasing hardness towards the back of the mould
Give uniform sand hardness throughout the mould
Ram the sand harder at the back of the mould and softer on the pattern face

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