Workshop Technology
In submerged arc welding, an arc is produced between a

Metal electrode and the work
Bare metal electrode and the work
Carbon electrode and the work
Two tungsten electrodes and the work

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Workshop Technology
In permanent mould casting method

None of these
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
Molten metal is poured and allowed to solidify while the mould is revolving

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