Workshop Technology
For gas welding, the pressure desired at the welding torch for acetylene is

280 to 560 kN/m²
70 to 280 kN/m²
7 to 103 kN/m²
560 to 840 kN/m²

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Workshop Technology
In permanent mould casting method

Molten metal is poured and allowed to solidify while the mould is revolving
Molten metal is poured in a metallic mould, retained in the mould long enough for the outer skin to solidify and finally mould is turned over to remove molten metal still in molten condition
Molten metal is forced into mould under high pressure
None of these

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Workshop Technology
Linde welding uses

Neutral flame and leftward technique
Neutral flame and rightward technique
Oxidizing flame and leftward technique
Carburising flame and rightward technique

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