Workshop Technology
A neutral flame is obtained by supplying

More volume of oxygen and less volume of acetylene
None of the listed here
More volume of acetylene and less volume of oxygen
Equal volumes of oxygen and acetylene

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Workshop Technology
In permanent mould casting method

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
None of these
Molten metal is poured and allowed to solidify while the mould is revolving
Molten metal is forced into mould under high pressure

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